diff --git linux-libre-4.19.174-gnu/Makefile linux-libre-4.19.175-gnu/Makefile
index 6a8678577bfa..13c23d862d96 100644
--- linux-libre-4.19.174-gnu/Makefile
+++ linux-libre-4.19.175-gnu/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 4
 PATCHLEVEL = 19
-SUBLEVEL = 174
+SUBLEVEL = 175
 EXTRAVERSION = -gnu
 NAME = "People's Front"
 
@@ -859,12 +859,6 @@ KBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
 # change __FILE__ to the relative path from the srctree
 KBUILD_CFLAGS	+= $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
 
-# ensure -fcf-protection is disabled when using retpoline as it is
-# incompatible with -mindirect-branch=thunk-extern
-ifdef CONFIG_RETPOLINE
-KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
-endif
-
 # use the deterministic mode of AR if available
 KBUILD_ARFLAGS := $(call ar-option,D)
 
diff --git linux-libre-4.19.174-gnu/arch/arm/mach-footbridge/dc21285.c linux-libre-4.19.175-gnu/arch/arm/mach-footbridge/dc21285.c
index 16d71bac0061..2d1f822700a1 100644
--- linux-libre-4.19.174-gnu/arch/arm/mach-footbridge/dc21285.c
+++ linux-libre-4.19.175-gnu/arch/arm/mach-footbridge/dc21285.c
@@ -69,15 +69,15 @@ dc21285_read_config(struct pci_bus *bus, unsigned int devfn, int where,
 	if (addr)
 		switch (size) {
 		case 1:
-			asm("ldrb	%0, [%1, %2]"
+			asm volatile("ldrb	%0, [%1, %2]"
 				: "=r" (v) : "r" (addr), "r" (where) : "cc");
 			break;
 		case 2:
-			asm("ldrh	%0, [%1, %2]"
+			asm volatile("ldrh	%0, [%1, %2]"
 				: "=r" (v) : "r" (addr), "r" (where) : "cc");
 			break;
 		case 4:
-			asm("ldr	%0, [%1, %2]"
+			asm volatile("ldr	%0, [%1, %2]"
 				: "=r" (v) : "r" (addr), "r" (where) : "cc");
 			break;
 		}
@@ -103,17 +103,17 @@ dc21285_write_config(struct pci_bus *bus, unsigned int devfn, int where,
 	if (addr)
 		switch (size) {
 		case 1:
-			asm("strb	%0, [%1, %2]"
+			asm volatile("strb	%0, [%1, %2]"
 				: : "r" (value), "r" (addr), "r" (where)
 				: "cc");
 			break;
 		case 2:
-			asm("strh	%0, [%1, %2]"
+			asm volatile("strh	%0, [%1, %2]"
 				: : "r" (value), "r" (addr), "r" (where)
 				: "cc");
 			break;
 		case 4:
-			asm("str	%0, [%1, %2]"
+			asm volatile("str	%0, [%1, %2]"
 				: : "r" (value), "r" (addr), "r" (where)
 				: "cc");
 			break;
diff --git linux-libre-4.19.174-gnu/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi linux-libre-4.19.175-gnu/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi
index de6af453a6e1..f4eb4d3b6cab 100644
--- linux-libre-4.19.174-gnu/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi
+++ linux-libre-4.19.175-gnu/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi
@@ -303,7 +303,7 @@
 
 		dcfg: dcfg@1ee0000 {
 			compatible = "fsl,ls1046a-dcfg", "syscon";
-			reg = <0x0 0x1ee0000 0x0 0x10000>;
+			reg = <0x0 0x1ee0000 0x0 0x1000>;
 			big-endian;
 		};
 
diff --git linux-libre-4.19.174-gnu/arch/x86/Makefile linux-libre-4.19.175-gnu/arch/x86/Makefile
index 4833dd7e2cc0..0303a243b634 100644
--- linux-libre-4.19.174-gnu/arch/x86/Makefile
+++ linux-libre-4.19.175-gnu/arch/x86/Makefile
@@ -132,6 +132,9 @@ else
         KBUILD_CFLAGS += -mno-red-zone
         KBUILD_CFLAGS += -mcmodel=kernel
 
+	# Intel CET isn't enabled in the kernel
+	KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
+
         # -funit-at-a-time shrinks the kernel .text considerably
         # unfortunately it makes reading oopses harder.
         KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
diff --git linux-libre-4.19.174-gnu/arch/x86/include/asm/apic.h linux-libre-4.19.175-gnu/arch/x86/include/asm/apic.h
index cd2aa72e2123..b5354e216b07 100644
--- linux-libre-4.19.174-gnu/arch/x86/include/asm/apic.h
+++ linux-libre-4.19.175-gnu/arch/x86/include/asm/apic.h
@@ -190,16 +190,6 @@ static inline void lapic_assign_legacy_vector(unsigned int i, bool r) { }
 #endif /* !CONFIG_X86_LOCAL_APIC */
 
 #ifdef CONFIG_X86_X2APIC
-/*
- * Make previous memory operations globally visible before
- * sending the IPI through x2apic wrmsr. We need a serializing instruction or
- * mfence for this.
- */
-static inline void x2apic_wrmsr_fence(void)
-{
-	asm volatile("mfence" : : : "memory");
-}
-
 static inline void native_apic_msr_write(u32 reg, u32 v)
 {
 	if (reg == APIC_DFR || reg == APIC_ID || reg == APIC_LDR ||
diff --git linux-libre-4.19.174-gnu/arch/x86/include/asm/barrier.h linux-libre-4.19.175-gnu/arch/x86/include/asm/barrier.h
index 84f848c2541a..dd22cffc6b3f 100644
--- linux-libre-4.19.174-gnu/arch/x86/include/asm/barrier.h
+++ linux-libre-4.19.175-gnu/arch/x86/include/asm/barrier.h
@@ -85,4 +85,22 @@ do {									\
 
 #include <asm-generic/barrier.h>
 
+/*
+ * Make previous memory operations globally visible before
+ * a WRMSR.
+ *
+ * MFENCE makes writes visible, but only affects load/store
+ * instructions.  WRMSR is unfortunately not a load/store
+ * instruction and is unaffected by MFENCE.  The LFENCE ensures
+ * that the WRMSR is not reordered.
+ *
+ * Most WRMSRs are full serializing instructions themselves and
+ * do not require this barrier.  This is only required for the
+ * IA32_TSC_DEADLINE and X2APIC MSRs.
+ */
+static inline void weak_wrmsr_fence(void)
+{
+	asm volatile("mfence; lfence" : : : "memory");
+}
+
 #endif /* _ASM_X86_BARRIER_H */
diff --git linux-libre-4.19.174-gnu/arch/x86/kernel/apic/apic.c linux-libre-4.19.175-gnu/arch/x86/kernel/apic/apic.c
index d2ed3ce8fa55..6b254f92b143 100644
--- linux-libre-4.19.174-gnu/arch/x86/kernel/apic/apic.c
+++ linux-libre-4.19.175-gnu/arch/x86/kernel/apic/apic.c
@@ -41,6 +41,7 @@
 #include <asm/x86_init.h>
 #include <asm/pgalloc.h>
 #include <linux/atomic.h>
+#include <asm/barrier.h>
 #include <asm/mpspec.h>
 #include <asm/i8259.h>
 #include <asm/proto.h>
@@ -465,6 +466,9 @@ static int lapic_next_deadline(unsigned long delta,
 {
 	u64 tsc;
 
+	/* This MSR is special and need a special fence: */
+	weak_wrmsr_fence();
+
 	tsc = rdtsc();
 	wrmsrl(MSR_IA32_TSC_DEADLINE, tsc + (((u64) delta) * TSC_DIVISOR));
 	return 0;
diff --git linux-libre-4.19.174-gnu/arch/x86/kernel/apic/x2apic_cluster.c linux-libre-4.19.175-gnu/arch/x86/kernel/apic/x2apic_cluster.c
index 145517934171..b2c7e3bc55d2 100644
--- linux-libre-4.19.174-gnu/arch/x86/kernel/apic/x2apic_cluster.c
+++ linux-libre-4.19.175-gnu/arch/x86/kernel/apic/x2apic_cluster.c
@@ -31,7 +31,8 @@ static void x2apic_send_IPI(int cpu, int vector)
 {
 	u32 dest = per_cpu(x86_cpu_to_logical_apicid, cpu);
 
-	x2apic_wrmsr_fence();
+	/* x2apic MSRs are special and need a special fence: */
+	weak_wrmsr_fence();
 	__x2apic_send_IPI_dest(dest, vector, APIC_DEST_LOGICAL);
 }
 
@@ -43,7 +44,8 @@ __x2apic_send_IPI_mask(const struct cpumask *mask, int vector, int apic_dest)
 	unsigned long flags;
 	u32 dest;
 
-	x2apic_wrmsr_fence();
+	/* x2apic MSRs are special and need a special fence: */
+	weak_wrmsr_fence();
 	local_irq_save(flags);
 
 	tmpmsk = this_cpu_cpumask_var_ptr(ipi_mask);
diff --git linux-libre-4.19.174-gnu/arch/x86/kernel/apic/x2apic_phys.c linux-libre-4.19.175-gnu/arch/x86/kernel/apic/x2apic_phys.c
index ed56d2850e96..8e70c2ba21b3 100644
--- linux-libre-4.19.174-gnu/arch/x86/kernel/apic/x2apic_phys.c
+++ linux-libre-4.19.175-gnu/arch/x86/kernel/apic/x2apic_phys.c
@@ -48,7 +48,8 @@ static void x2apic_send_IPI(int cpu, int vector)
 {
 	u32 dest = per_cpu(x86_cpu_to_apicid, cpu);
 
-	x2apic_wrmsr_fence();
+	/* x2apic MSRs are special and need a special fence: */
+	weak_wrmsr_fence();
 	__x2apic_send_IPI_dest(dest, vector, APIC_DEST_PHYSICAL);
 }
 
@@ -59,7 +60,8 @@ __x2apic_send_IPI_mask(const struct cpumask *mask, int vector, int apic_dest)
 	unsigned long this_cpu;
 	unsigned long flags;
 
-	x2apic_wrmsr_fence();
+	/* x2apic MSRs are special and need a special fence: */
+	weak_wrmsr_fence();
 
 	local_irq_save(flags);
 
diff --git linux-libre-4.19.174-gnu/arch/x86/kvm/svm.c linux-libre-4.19.175-gnu/arch/x86/kvm/svm.c
index d2dc734f5bd0..f1e86051aa5f 100644
--- linux-libre-4.19.174-gnu/arch/x86/kvm/svm.c
+++ linux-libre-4.19.175-gnu/arch/x86/kvm/svm.c
@@ -892,6 +892,11 @@ static int has_svm(void)
 		return 0;
 	}
 
+	if (sev_active()) {
+		pr_info("KVM is unsupported when running as an SEV guest\n");
+		return 0;
+	}
+
 	return 1;
 }
 
diff --git linux-libre-4.19.174-gnu/drivers/input/joystick/xpad.c linux-libre-4.19.175-gnu/drivers/input/joystick/xpad.c
index ee3ff0894d09..ef4e8423843f 100644
--- linux-libre-4.19.174-gnu/drivers/input/joystick/xpad.c
+++ linux-libre-4.19.175-gnu/drivers/input/joystick/xpad.c
@@ -229,9 +229,17 @@ static const struct xpad_device {
 	{ 0x0e6f, 0x0213, "Afterglow Gamepad for Xbox 360", 0, XTYPE_XBOX360 },
 	{ 0x0e6f, 0x021f, "Rock Candy Gamepad for Xbox 360", 0, XTYPE_XBOX360 },
 	{ 0x0e6f, 0x0246, "Rock Candy Gamepad for Xbox One 2015", 0, XTYPE_XBOXONE },
-	{ 0x0e6f, 0x02ab, "PDP Controller for Xbox One", 0, XTYPE_XBOXONE },
+	{ 0x0e6f, 0x02a0, "PDP Xbox One Controller", 0, XTYPE_XBOXONE },
+	{ 0x0e6f, 0x02a1, "PDP Xbox One Controller", 0, XTYPE_XBOXONE },
+	{ 0x0e6f, 0x02a2, "PDP Wired Controller for Xbox One - Crimson Red", 0, XTYPE_XBOXONE },
 	{ 0x0e6f, 0x02a4, "PDP Wired Controller for Xbox One - Stealth Series", 0, XTYPE_XBOXONE },
 	{ 0x0e6f, 0x02a6, "PDP Wired Controller for Xbox One - Camo Series", 0, XTYPE_XBOXONE },
+	{ 0x0e6f, 0x02a7, "PDP Xbox One Controller", 0, XTYPE_XBOXONE },
+	{ 0x0e6f, 0x02a8, "PDP Xbox One Controller", 0, XTYPE_XBOXONE },
+	{ 0x0e6f, 0x02ab, "PDP Controller for Xbox One", 0, XTYPE_XBOXONE },
+	{ 0x0e6f, 0x02ad, "PDP Wired Controller for Xbox One - Stealth Series", 0, XTYPE_XBOXONE },
+	{ 0x0e6f, 0x02b3, "Afterglow Prismatic Wired Controller", 0, XTYPE_XBOXONE },
+	{ 0x0e6f, 0x02b8, "Afterglow Prismatic Wired Controller", 0, XTYPE_XBOXONE },
 	{ 0x0e6f, 0x0301, "Logic3 Controller", 0, XTYPE_XBOX360 },
 	{ 0x0e6f, 0x0346, "Rock Candy Gamepad for Xbox One 2016", 0, XTYPE_XBOXONE },
 	{ 0x0e6f, 0x0401, "Logic3 Controller", 0, XTYPE_XBOX360 },
@@ -310,6 +318,9 @@ static const struct xpad_device {
 	{ 0x1bad, 0xfa01, "MadCatz GamePad", 0, XTYPE_XBOX360 },
 	{ 0x1bad, 0xfd00, "Razer Onza TE", 0, XTYPE_XBOX360 },
 	{ 0x1bad, 0xfd01, "Razer Onza", 0, XTYPE_XBOX360 },
+	{ 0x20d6, 0x2001, "BDA Xbox Series X Wired Controller", 0, XTYPE_XBOXONE },
+	{ 0x20d6, 0x281f, "PowerA Wired Controller For Xbox 360", 0, XTYPE_XBOX360 },
+	{ 0x2e24, 0x0652, "Hyperkin Duke X-Box One pad", 0, XTYPE_XBOXONE },
 	{ 0x24c6, 0x5000, "Razer Atrox Arcade Stick", MAP_TRIGGERS_TO_BUTTONS, XTYPE_XBOX360 },
 	{ 0x24c6, 0x5300, "PowerA MINI PROEX Controller", 0, XTYPE_XBOX360 },
 	{ 0x24c6, 0x5303, "Xbox Airflo wired controller", 0, XTYPE_XBOX360 },
@@ -443,8 +454,12 @@ static const struct usb_device_id xpad_table[] = {
 	XPAD_XBOX360_VENDOR(0x162e),		/* Joytech X-Box 360 controllers */
 	XPAD_XBOX360_VENDOR(0x1689),		/* Razer Onza */
 	XPAD_XBOX360_VENDOR(0x1bad),		/* Harminix Rock Band Guitar and Drums */
+	XPAD_XBOX360_VENDOR(0x20d6),		/* PowerA Controllers */
+	XPAD_XBOXONE_VENDOR(0x20d6),		/* PowerA Controllers */
 	XPAD_XBOX360_VENDOR(0x24c6),		/* PowerA Controllers */
 	XPAD_XBOXONE_VENDOR(0x24c6),		/* PowerA Controllers */
+	XPAD_XBOXONE_VENDOR(0x2e24),		/* Hyperkin Duke X-Box One pad */
+	XPAD_XBOX360_VENDOR(0x2f24),		/* GameSir Controllers */
 	{ }
 };
 
diff --git linux-libre-4.19.174-gnu/drivers/input/serio/i8042-x86ia64io.h linux-libre-4.19.175-gnu/drivers/input/serio/i8042-x86ia64io.h
index b256e3006a6f..844875df8cad 100644
--- linux-libre-4.19.174-gnu/drivers/input/serio/i8042-x86ia64io.h
+++ linux-libre-4.19.175-gnu/drivers/input/serio/i8042-x86ia64io.h
@@ -223,6 +223,8 @@ static const struct dmi_system_id __initconst i8042_dmi_noloop_table[] = {
 			DMI_MATCH(DMI_SYS_VENDOR, "PEGATRON CORPORATION"),
 			DMI_MATCH(DMI_PRODUCT_NAME, "C15B"),
 		},
+	},
+	{
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "ByteSpeed LLC"),
 			DMI_MATCH(DMI_PRODUCT_NAME, "ByteSpeed Laptop C15B"),
diff --git linux-libre-4.19.174-gnu/drivers/iommu/intel-iommu.c linux-libre-4.19.175-gnu/drivers/iommu/intel-iommu.c
index 2a83fc31dd47..d2166dfc8b3f 100644
--- linux-libre-4.19.174-gnu/drivers/iommu/intel-iommu.c
+++ linux-libre-4.19.175-gnu/drivers/iommu/intel-iommu.c
@@ -3364,6 +3364,12 @@ static int __init init_dmars(void)
 
 		if (!ecap_pass_through(iommu->ecap))
 			hw_pass_through = 0;
+
+		if (!intel_iommu_strict && cap_caching_mode(iommu->cap)) {
+			pr_info("Disable batched IOTLB flush due to virtualization");
+			intel_iommu_strict = 1;
+		}
+
 #ifdef CONFIG_INTEL_IOMMU_SVM
 		if (pasid_enabled(iommu))
 			intel_svm_init(iommu);
diff --git linux-libre-4.19.174-gnu/drivers/md/md.c linux-libre-4.19.175-gnu/drivers/md/md.c
index 80ca13594c18..09f0d8e70b70 100644
--- linux-libre-4.19.174-gnu/drivers/md/md.c
+++ linux-libre-4.19.175-gnu/drivers/md/md.c
@@ -474,8 +474,10 @@ static void md_submit_flush_data(struct work_struct *ws)
 	 * could wait for this and below md_handle_request could wait for those
 	 * bios because of suspend check
 	 */
+	spin_lock_irq(&mddev->lock);
 	mddev->last_flush = mddev->start_flush;
 	mddev->flush_bio = NULL;
+	spin_unlock_irq(&mddev->lock);
 	wake_up(&mddev->sb_wait);
 
 	if (bio->bi_iter.bi_size == 0) {
diff --git linux-libre-4.19.174-gnu/drivers/mmc/core/sdio_cis.c linux-libre-4.19.175-gnu/drivers/mmc/core/sdio_cis.c
index 2ca5cd79018b..dca72444b312 100644
--- linux-libre-4.19.174-gnu/drivers/mmc/core/sdio_cis.c
+++ linux-libre-4.19.175-gnu/drivers/mmc/core/sdio_cis.c
@@ -24,6 +24,8 @@
 #include "sdio_cis.h"
 #include "sdio_ops.h"
 
+#define SDIO_READ_CIS_TIMEOUT_MS  (10 * 1000) /* 10s */
+
 static int cistpl_vers_1(struct mmc_card *card, struct sdio_func *func,
 			 const unsigned char *buf, unsigned size)
 {
@@ -270,6 +272,8 @@ static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func)
 
 	do {
 		unsigned char tpl_code, tpl_link;
+		unsigned long timeout = jiffies +
+			msecs_to_jiffies(SDIO_READ_CIS_TIMEOUT_MS);
 
 		ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_code);
 		if (ret)
@@ -322,6 +326,8 @@ static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func)
 			prev = &this->next;
 
 			if (ret == -ENOENT) {
+				if (time_after(jiffies, timeout))
+					break;
 				/* warn about unknown tuples */
 				pr_warn_ratelimited("%s: queuing unknown"
 				       " CIS tuple 0x%02x (%u bytes)\n",
diff --git linux-libre-4.19.174-gnu/drivers/net/dsa/mv88e6xxx/chip.c linux-libre-4.19.175-gnu/drivers/net/dsa/mv88e6xxx/chip.c
index 6fa8aa69b418..e04b7fa068af 100644
--- linux-libre-4.19.174-gnu/drivers/net/dsa/mv88e6xxx/chip.c
+++ linux-libre-4.19.175-gnu/drivers/net/dsa/mv88e6xxx/chip.c
@@ -1658,7 +1658,11 @@ static int mv88e6xxx_port_db_load_purge(struct mv88e6xxx_chip *chip, int port,
 		if (!entry.portvec)
 			entry.state = MV88E6XXX_G1_ATU_DATA_STATE_UNUSED;
 	} else {
-		entry.portvec |= BIT(port);
+		if (state == MV88E6XXX_G1_ATU_DATA_STATE_UC_STATIC)
+			entry.portvec = BIT(port);
+		else
+			entry.portvec |= BIT(port);
+
 		entry.state = state;
 	}
 
diff --git linux-libre-4.19.174-gnu/drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c linux-libre-4.19.175-gnu/drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c
index a30eb90ba3d2..dd590086fe6a 100644
--- linux-libre-4.19.174-gnu/drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c
+++ linux-libre-4.19.175-gnu/drivers/net/ethernet/marvell/mvpp2/mvpp2_prs.c
@@ -29,16 +29,16 @@ static int mvpp2_prs_hw_write(struct mvpp2 *priv, struct mvpp2_prs_entry *pe)
 	/* Clear entry invalidation bit */
 	pe->tcam[MVPP2_PRS_TCAM_INV_WORD] &= ~MVPP2_PRS_TCAM_INV_MASK;
 
-	/* Write tcam index - indirect access */
-	mvpp2_write(priv, MVPP2_PRS_TCAM_IDX_REG, pe->index);
-	for (i = 0; i < MVPP2_PRS_TCAM_WORDS; i++)
-		mvpp2_write(priv, MVPP2_PRS_TCAM_DATA_REG(i), pe->tcam[i]);
-
 	/* Write sram index - indirect access */
 	mvpp2_write(priv, MVPP2_PRS_SRAM_IDX_REG, pe->index);
 	for (i = 0; i < MVPP2_PRS_SRAM_WORDS; i++)
 		mvpp2_write(priv, MVPP2_PRS_SRAM_DATA_REG(i), pe->sram[i]);
 
+	/* Write tcam index - indirect access */
+	mvpp2_write(priv, MVPP2_PRS_TCAM_IDX_REG, pe->index);
+	for (i = 0; i < MVPP2_PRS_TCAM_WORDS; i++)
+		mvpp2_write(priv, MVPP2_PRS_TCAM_DATA_REG(i), pe->tcam[i]);
+
 	return 0;
 }
 
diff --git linux-libre-4.19.174-gnu/drivers/nvme/host/pci.c linux-libre-4.19.175-gnu/drivers/nvme/host/pci.c
index a52b2f15f372..82d87d2e280c 100644
--- linux-libre-4.19.174-gnu/drivers/nvme/host/pci.c
+++ linux-libre-4.19.175-gnu/drivers/nvme/host/pci.c
@@ -2733,6 +2733,8 @@ static const struct pci_device_id nvme_id_table[] = {
 	{ PCI_DEVICE(0x1d1d, 0x2601),	/* CNEX Granby */
 		.driver_data = NVME_QUIRK_LIGHTNVM, },
 	{ PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) },
+	{ PCI_DEVICE(0x2646, 0x2263),   /* KINGSTON A2000 NVMe SSD  */
+		.driver_data = NVME_QUIRK_NO_DEEPEST_PS, },
 	{ PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2001) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2003) },
 	{ 0, }
diff --git linux-libre-4.19.174-gnu/drivers/usb/class/usblp.c linux-libre-4.19.175-gnu/drivers/usb/class/usblp.c
index 5c00d79ac7a1..c9560d8ba3cb 100644
--- linux-libre-4.19.174-gnu/drivers/usb/class/usblp.c
+++ linux-libre-4.19.175-gnu/drivers/usb/class/usblp.c
@@ -1327,14 +1327,17 @@ static int usblp_set_protocol(struct usblp *usblp, int protocol)
 	if (protocol < USBLP_FIRST_PROTOCOL || protocol > USBLP_LAST_PROTOCOL)
 		return -EINVAL;
 
-	alts = usblp->protocol[protocol].alt_setting;
-	if (alts < 0)
-		return -EINVAL;
-	r = usb_set_interface(usblp->dev, usblp->ifnum, alts);
-	if (r < 0) {
-		printk(KERN_ERR "usblp: can't set desired altsetting %d on interface %d\n",
-			alts, usblp->ifnum);
-		return r;
+	/* Don't unnecessarily set the interface if there's a single alt. */
+	if (usblp->intf->num_altsetting > 1) {
+		alts = usblp->protocol[protocol].alt_setting;
+		if (alts < 0)
+			return -EINVAL;
+		r = usb_set_interface(usblp->dev, usblp->ifnum, alts);
+		if (r < 0) {
+			printk(KERN_ERR "usblp: can't set desired altsetting %d on interface %d\n",
+				alts, usblp->ifnum);
+			return r;
+		}
 	}
 
 	usblp->bidir = (usblp->protocol[protocol].epread != NULL);
diff --git linux-libre-4.19.174-gnu/drivers/usb/dwc2/gadget.c linux-libre-4.19.175-gnu/drivers/usb/dwc2/gadget.c
index 8e98b4df9b10..42f66718bc18 100644
--- linux-libre-4.19.174-gnu/drivers/usb/dwc2/gadget.c
+++ linux-libre-4.19.175-gnu/drivers/usb/dwc2/gadget.c
@@ -1453,7 +1453,6 @@ static void dwc2_hsotg_complete_oursetup(struct usb_ep *ep,
 static struct dwc2_hsotg_ep *ep_from_windex(struct dwc2_hsotg *hsotg,
 					    u32 windex)
 {
-	struct dwc2_hsotg_ep *ep;
 	int dir = (windex & USB_DIR_IN) ? 1 : 0;
 	int idx = windex & 0x7F;
 
@@ -1463,12 +1462,7 @@ static struct dwc2_hsotg_ep *ep_from_windex(struct dwc2_hsotg *hsotg,
 	if (idx > hsotg->num_of_eps)
 		return NULL;
 
-	ep = index_to_ep(hsotg, idx, dir);
-
-	if (idx && ep->dir_in != dir)
-		return NULL;
-
-	return ep;
+	return index_to_ep(hsotg, idx, dir);
 }
 
 /**
diff --git linux-libre-4.19.174-gnu/drivers/usb/dwc3/core.c linux-libre-4.19.175-gnu/drivers/usb/dwc3/core.c
index 86b1cfbe48a0..e890c26b6c82 100644
--- linux-libre-4.19.174-gnu/drivers/usb/dwc3/core.c
+++ linux-libre-4.19.175-gnu/drivers/usb/dwc3/core.c
@@ -1700,7 +1700,7 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg)
 		if (PMSG_IS_AUTO(msg))
 			break;
 
-		ret = dwc3_core_init(dwc);
+		ret = dwc3_core_init_for_resume(dwc);
 		if (ret)
 			return ret;
 
diff --git linux-libre-4.19.174-gnu/drivers/usb/gadget/legacy/ether.c linux-libre-4.19.175-gnu/drivers/usb/gadget/legacy/ether.c
index 30313b233680..99c7fc0d1d59 100644
--- linux-libre-4.19.174-gnu/drivers/usb/gadget/legacy/ether.c
+++ linux-libre-4.19.175-gnu/drivers/usb/gadget/legacy/ether.c
@@ -403,8 +403,10 @@ static int eth_bind(struct usb_composite_dev *cdev)
 		struct usb_descriptor_header *usb_desc;
 
 		usb_desc = usb_otg_descriptor_alloc(gadget);
-		if (!usb_desc)
+		if (!usb_desc) {
+			status = -ENOMEM;
 			goto fail1;
+		}
 		usb_otg_descriptor_init(gadget, usb_desc);
 		otg_desc[0] = usb_desc;
 		otg_desc[1] = NULL;
diff --git linux-libre-4.19.174-gnu/drivers/usb/host/xhci-ring.c linux-libre-4.19.175-gnu/drivers/usb/host/xhci-ring.c
index 537bbcd47c46..22b1de99d02d 100644
--- linux-libre-4.19.174-gnu/drivers/usb/host/xhci-ring.c
+++ linux-libre-4.19.175-gnu/drivers/usb/host/xhci-ring.c
@@ -670,11 +670,16 @@ static void xhci_unmap_td_bounce_buffer(struct xhci_hcd *xhci,
 	dma_unmap_single(dev, seg->bounce_dma, ring->bounce_buf_len,
 			 DMA_FROM_DEVICE);
 	/* for in tranfers we need to copy the data from bounce to sg */
-	len = sg_pcopy_from_buffer(urb->sg, urb->num_sgs, seg->bounce_buf,
-			     seg->bounce_len, seg->bounce_offs);
-	if (len != seg->bounce_len)
-		xhci_warn(xhci, "WARN Wrong bounce buffer read length: %zu != %d\n",
-				len, seg->bounce_len);
+	if (urb->num_sgs) {
+		len = sg_pcopy_from_buffer(urb->sg, urb->num_sgs, seg->bounce_buf,
+					   seg->bounce_len, seg->bounce_offs);
+		if (len != seg->bounce_len)
+			xhci_warn(xhci, "WARN Wrong bounce buffer read length: %zu != %d\n",
+				  len, seg->bounce_len);
+	} else {
+		memcpy(urb->transfer_buffer + seg->bounce_offs, seg->bounce_buf,
+		       seg->bounce_len);
+	}
 	seg->bounce_len = 0;
 	seg->bounce_offs = 0;
 }
@@ -3180,12 +3185,16 @@ static int xhci_align_td(struct xhci_hcd *xhci, struct urb *urb, u32 enqd_len,
 
 	/* create a max max_pkt sized bounce buffer pointed to by last trb */
 	if (usb_urb_dir_out(urb)) {
-		len = sg_pcopy_to_buffer(urb->sg, urb->num_sgs,
-				   seg->bounce_buf, new_buff_len, enqd_len);
-		if (len != new_buff_len)
-			xhci_warn(xhci,
-				"WARN Wrong bounce buffer write length: %zu != %d\n",
-				len, new_buff_len);
+		if (urb->num_sgs) {
+			len = sg_pcopy_to_buffer(urb->sg, urb->num_sgs,
+						 seg->bounce_buf, new_buff_len, enqd_len);
+			if (len != new_buff_len)
+				xhci_warn(xhci, "WARN Wrong bounce buffer write length: %zu != %d\n",
+					  len, new_buff_len);
+		} else {
+			memcpy(seg->bounce_buf, urb->transfer_buffer + enqd_len, new_buff_len);
+		}
+
 		seg->bounce_dma = dma_map_single(dev, seg->bounce_buf,
 						 max_pkt, DMA_TO_DEVICE);
 	} else {
diff --git linux-libre-4.19.174-gnu/drivers/usb/renesas_usbhs/fifo.c linux-libre-4.19.175-gnu/drivers/usb/renesas_usbhs/fifo.c
index aeb53ec5cc6a..6b92a57382db 100644
--- linux-libre-4.19.174-gnu/drivers/usb/renesas_usbhs/fifo.c
+++ linux-libre-4.19.175-gnu/drivers/usb/renesas_usbhs/fifo.c
@@ -126,6 +126,7 @@ struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt)
 		}
 
 		usbhs_pipe_clear_without_sequence(pipe, 0, 0);
+		usbhs_pipe_running(pipe, 0);
 
 		__usbhsf_pkt_del(pkt);
 	}
diff --git linux-libre-4.19.174-gnu/drivers/usb/serial/cp210x.c linux-libre-4.19.175-gnu/drivers/usb/serial/cp210x.c
index 46ec30a2c516..07a2c72fc3a7 100644
--- linux-libre-4.19.174-gnu/drivers/usb/serial/cp210x.c
+++ linux-libre-4.19.175-gnu/drivers/usb/serial/cp210x.c
@@ -61,6 +61,7 @@ static const struct usb_device_id id_table[] = {
 	{ USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
 	{ USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
 	{ USB_DEVICE(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */
+	{ USB_DEVICE(0x0988, 0x0578) }, /* Teraoka AD2000 */
 	{ USB_DEVICE(0x0B00, 0x3070) }, /* Ingenico 3070 */
 	{ USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
 	{ USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
@@ -201,6 +202,7 @@ static const struct usb_device_id id_table[] = {
 	{ USB_DEVICE(0x1901, 0x0194) },	/* GE Healthcare Remote Alarm Box */
 	{ USB_DEVICE(0x1901, 0x0195) },	/* GE B850/B650/B450 CP2104 DP UART interface */
 	{ USB_DEVICE(0x1901, 0x0196) },	/* GE B850 CP2105 DP UART interface */
+	{ USB_DEVICE(0x199B, 0xBA30) }, /* LORD WSDA-200-USB */
 	{ USB_DEVICE(0x19CF, 0x3000) }, /* Parrot NMEA GPS Flight Recorder */
 	{ USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
 	{ USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
diff --git linux-libre-4.19.174-gnu/drivers/usb/serial/option.c linux-libre-4.19.175-gnu/drivers/usb/serial/option.c
index 1024aca25221..cdf25a39fca7 100644
--- linux-libre-4.19.174-gnu/drivers/usb/serial/option.c
+++ linux-libre-4.19.175-gnu/drivers/usb/serial/option.c
@@ -425,6 +425,8 @@ static void option_instat_callback(struct urb *urb);
 #define CINTERION_PRODUCT_AHXX_2RMNET		0x0084
 #define CINTERION_PRODUCT_AHXX_AUDIO		0x0085
 #define CINTERION_PRODUCT_CLS8			0x00b0
+#define CINTERION_PRODUCT_MV31_MBIM		0x00b3
+#define CINTERION_PRODUCT_MV31_RMNET		0x00b7
 
 /* Olivetti products */
 #define OLIVETTI_VENDOR_ID			0x0b3c
@@ -1914,6 +1916,10 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE(SIEMENS_VENDOR_ID, CINTERION_PRODUCT_HC25_MDMNET) },
 	{ USB_DEVICE(SIEMENS_VENDOR_ID, CINTERION_PRODUCT_HC28_MDM) }, /* HC28 enumerates with Siemens or Cinterion VID depending on FW revision */
 	{ USB_DEVICE(SIEMENS_VENDOR_ID, CINTERION_PRODUCT_HC28_MDMNET) },
+	{ USB_DEVICE_INTERFACE_CLASS(CINTERION_VENDOR_ID, CINTERION_PRODUCT_MV31_MBIM, 0xff),
+	  .driver_info = RSVD(3)},
+	{ USB_DEVICE_INTERFACE_CLASS(CINTERION_VENDOR_ID, CINTERION_PRODUCT_MV31_RMNET, 0xff),
+	  .driver_info = RSVD(0)},
 	{ USB_DEVICE(OLIVETTI_VENDOR_ID, OLIVETTI_PRODUCT_OLICARD100),
 	  .driver_info = RSVD(4) },
 	{ USB_DEVICE(OLIVETTI_VENDOR_ID, OLIVETTI_PRODUCT_OLICARD120),
diff --git linux-libre-4.19.174-gnu/fs/afs/main.c linux-libre-4.19.175-gnu/fs/afs/main.c
index 107427688edd..8ecb127be63f 100644
--- linux-libre-4.19.174-gnu/fs/afs/main.c
+++ linux-libre-4.19.175-gnu/fs/afs/main.c
@@ -190,7 +190,7 @@ static int __init afs_init(void)
 		goto error_cache;
 #endif
 
-	ret = register_pernet_subsys(&afs_net_ops);
+	ret = register_pernet_device(&afs_net_ops);
 	if (ret < 0)
 		goto error_net;
 
@@ -210,7 +210,7 @@ static int __init afs_init(void)
 error_proc:
 	afs_fs_exit();
 error_fs:
-	unregister_pernet_subsys(&afs_net_ops);
+	unregister_pernet_device(&afs_net_ops);
 error_net:
 #ifdef CONFIG_AFS_FSCACHE
 	fscache_unregister_netfs(&afs_cache_netfs);
@@ -241,7 +241,7 @@ static void __exit afs_exit(void)
 
 	proc_remove(afs_proc_symlink);
 	afs_fs_exit();
-	unregister_pernet_subsys(&afs_net_ops);
+	unregister_pernet_device(&afs_net_ops);
 #ifdef CONFIG_AFS_FSCACHE
 	fscache_unregister_netfs(&afs_cache_netfs);
 #endif
diff --git linux-libre-4.19.174-gnu/fs/cifs/dir.c linux-libre-4.19.175-gnu/fs/cifs/dir.c
index f6e3c0089825..c7e162c9383d 100644
--- linux-libre-4.19.174-gnu/fs/cifs/dir.c
+++ linux-libre-4.19.175-gnu/fs/cifs/dir.c
@@ -840,6 +840,7 @@ static int
 cifs_d_revalidate(struct dentry *direntry, unsigned int flags)
 {
 	struct inode *inode;
+	int rc;
 
 	if (flags & LOOKUP_RCU)
 		return -ECHILD;
@@ -849,8 +850,25 @@ cifs_d_revalidate(struct dentry *direntry, unsigned int flags)
 		if ((flags & LOOKUP_REVAL) && !CIFS_CACHE_READ(CIFS_I(inode)))
 			CIFS_I(inode)->time = 0; /* force reval */
 
-		if (cifs_revalidate_dentry(direntry))
-			return 0;
+		rc = cifs_revalidate_dentry(direntry);
+		if (rc) {
+			cifs_dbg(FYI, "cifs_revalidate_dentry failed with rc=%d", rc);
+			switch (rc) {
+			case -ENOENT:
+			case -ESTALE:
+				/*
+				 * Those errors mean the dentry is invalid
+				 * (file was deleted or recreated)
+				 */
+				return 0;
+			default:
+				/*
+				 * Otherwise some unexpected error happened
+				 * report it as-is to VFS layer
+				 */
+				return rc;
+			}
+		}
 		else {
 			/*
 			 * If the inode wasn't known to be a dfs entry when
diff --git linux-libre-4.19.174-gnu/fs/cifs/smb2pdu.h linux-libre-4.19.175-gnu/fs/cifs/smb2pdu.h
index 48ed43e6aee8..8a44d59947b7 100644
--- linux-libre-4.19.174-gnu/fs/cifs/smb2pdu.h
+++ linux-libre-4.19.175-gnu/fs/cifs/smb2pdu.h
@@ -222,7 +222,7 @@ struct smb2_negotiate_req {
 	__le32 NegotiateContextOffset; /* SMB3.1.1 only. MBZ earlier */
 	__le16 NegotiateContextCount;  /* SMB3.1.1 only. MBZ earlier */
 	__le16 Reserved2;
-	__le16 Dialects[1]; /* One dialect (vers=) at a time for now */
+	__le16 Dialects[4]; /* BB expand this if autonegotiate > 4 dialects */
 } __packed;
 
 /* Dialects */
diff --git linux-libre-4.19.174-gnu/fs/hugetlbfs/inode.c linux-libre-4.19.175-gnu/fs/hugetlbfs/inode.c
index 7a24f91af29e..3a2fea8d211d 100644
--- linux-libre-4.19.174-gnu/fs/hugetlbfs/inode.c
+++ linux-libre-4.19.175-gnu/fs/hugetlbfs/inode.c
@@ -654,9 +654,10 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset,
 
 		mutex_unlock(&hugetlb_fault_mutex_table[hash]);
 
+		set_page_huge_active(page);
 		/*
 		 * unlock_page because locked by add_to_page_cache()
-		 * page_put due to reference from alloc_huge_page()
+		 * put_page() due to reference from alloc_huge_page()
 		 */
 		unlock_page(page);
 		put_page(page);
diff --git linux-libre-4.19.174-gnu/fs/overlayfs/dir.c linux-libre-4.19.175-gnu/fs/overlayfs/dir.c
index 800bcad67325..25be2ab6ff6c 100644
--- linux-libre-4.19.174-gnu/fs/overlayfs/dir.c
+++ linux-libre-4.19.175-gnu/fs/overlayfs/dir.c
@@ -946,8 +946,8 @@ static char *ovl_get_redirect(struct dentry *dentry, bool abs_redirect)
 
 		buflen -= thislen;
 		memcpy(&buf[buflen], name, thislen);
-		tmp = dget_dlock(d->d_parent);
 		spin_unlock(&d->d_lock);
+		tmp = dget_parent(d);
 
 		dput(d);
 		d = tmp;
diff --git linux-libre-4.19.174-gnu/include/linux/elfcore.h linux-libre-4.19.175-gnu/include/linux/elfcore.h
index 4cad0e784b28..b81f9e1d74b0 100644
--- linux-libre-4.19.174-gnu/include/linux/elfcore.h
+++ linux-libre-4.19.175-gnu/include/linux/elfcore.h
@@ -58,6 +58,7 @@ static inline int elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregse
 }
 #endif
 
+#if defined(CONFIG_UM) || defined(CONFIG_IA64)
 /*
  * These functions parameterize elf_core_dump in fs/binfmt_elf.c to write out
  * extra segments containing the gate DSO contents.  Dumping its
@@ -72,5 +73,26 @@ elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset);
 extern int
 elf_core_write_extra_data(struct coredump_params *cprm);
 extern size_t elf_core_extra_data_size(void);
+#else
+static inline Elf_Half elf_core_extra_phdrs(void)
+{
+	return 0;
+}
+
+static inline int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
+{
+	return 1;
+}
+
+static inline int elf_core_write_extra_data(struct coredump_params *cprm)
+{
+	return 1;
+}
+
+static inline size_t elf_core_extra_data_size(void)
+{
+	return 0;
+}
+#endif
 
 #endif /* _LINUX_ELFCORE_H */
diff --git linux-libre-4.19.174-gnu/include/linux/hugetlb.h linux-libre-4.19.175-gnu/include/linux/hugetlb.h
index d34112fb3d52..cae7fd680448 100644
--- linux-libre-4.19.174-gnu/include/linux/hugetlb.h
+++ linux-libre-4.19.175-gnu/include/linux/hugetlb.h
@@ -541,6 +541,9 @@ static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr
 	set_huge_pte_at(mm, addr, ptep, pte);
 }
 #endif
+
+void set_page_huge_active(struct page *page);
+
 #else	/* CONFIG_HUGETLB_PAGE */
 struct hstate {};
 #define alloc_huge_page(v, a, r) NULL
diff --git linux-libre-4.19.174-gnu/include/linux/msi.h linux-libre-4.19.175-gnu/include/linux/msi.h
index be8ec813dbfb..5dd171849a27 100644
--- linux-libre-4.19.174-gnu/include/linux/msi.h
+++ linux-libre-4.19.175-gnu/include/linux/msi.h
@@ -118,6 +118,12 @@ struct msi_desc {
 	list_for_each_entry((desc), dev_to_msi_list((dev)), list)
 #define for_each_msi_entry_safe(desc, tmp, dev)	\
 	list_for_each_entry_safe((desc), (tmp), dev_to_msi_list((dev)), list)
+#define for_each_msi_vector(desc, __irq, dev)				\
+	for_each_msi_entry((desc), (dev))				\
+		if ((desc)->irq)					\
+			for (__irq = (desc)->irq;			\
+			     __irq < ((desc)->irq + (desc)->nvec_used);	\
+			     __irq++)
 
 #ifdef CONFIG_PCI_MSI
 #define first_pci_msi_entry(pdev)	first_msi_entry(&(pdev)->dev)
diff --git linux-libre-4.19.174-gnu/kernel/Makefile linux-libre-4.19.175-gnu/kernel/Makefile
index ad4b324d8906..01bc1d39b400 100644
--- linux-libre-4.19.174-gnu/kernel/Makefile
+++ linux-libre-4.19.175-gnu/kernel/Makefile
@@ -92,7 +92,6 @@ obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o
 obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o
 obj-$(CONFIG_TRACEPOINTS) += tracepoint.o
 obj-$(CONFIG_LATENCYTOP) += latencytop.o
-obj-$(CONFIG_ELFCORE) += elfcore.o
 obj-$(CONFIG_FUNCTION_TRACER) += trace/
 obj-$(CONFIG_TRACING) += trace/
 obj-$(CONFIG_TRACE_CLOCK) += trace/
diff --git linux-libre-4.19.174-gnu/kernel/elfcore.c linux-libre-4.19.175-gnu/kernel/elfcore.c
deleted file mode 100644
index 57fb4dcff434..000000000000
--- linux-libre-4.19.174-gnu/kernel/elfcore.c
+++ /dev/null
@@ -1,26 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/elf.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
-#include <linux/binfmts.h>
-#include <linux/elfcore.h>
-
-Elf_Half __weak elf_core_extra_phdrs(void)
-{
-	return 0;
-}
-
-int __weak elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset)
-{
-	return 1;
-}
-
-int __weak elf_core_write_extra_data(struct coredump_params *cprm)
-{
-	return 1;
-}
-
-size_t __weak elf_core_extra_data_size(void)
-{
-	return 0;
-}
diff --git linux-libre-4.19.174-gnu/kernel/irq/msi.c linux-libre-4.19.175-gnu/kernel/irq/msi.c
index dc1186ce3ecd..604974f2afb1 100644
--- linux-libre-4.19.174-gnu/kernel/irq/msi.c
+++ linux-libre-4.19.175-gnu/kernel/irq/msi.c
@@ -437,22 +437,22 @@ int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,
 
 	can_reserve = msi_check_reservation_mode(domain, info, dev);
 
-	for_each_msi_entry(desc, dev) {
-		virq = desc->irq;
-		if (desc->nvec_used == 1)
-			dev_dbg(dev, "irq %d for MSI\n", virq);
-		else
+	/*
+	 * This flag is set by the PCI layer as we need to activate
+	 * the MSI entries before the PCI layer enables MSI in the
+	 * card. Otherwise the card latches a random msi message.
+	 */
+	if (!(info->flags & MSI_FLAG_ACTIVATE_EARLY))
+		goto skip_activate;
+
+	for_each_msi_vector(desc, i, dev) {
+		if (desc->irq == i) {
+			virq = desc->irq;
 			dev_dbg(dev, "irq [%d-%d] for MSI\n",
 				virq, virq + desc->nvec_used - 1);
-		/*
-		 * This flag is set by the PCI layer as we need to activate
-		 * the MSI entries before the PCI layer enables MSI in the
-		 * card. Otherwise the card latches a random msi message.
-		 */
-		if (!(info->flags & MSI_FLAG_ACTIVATE_EARLY))
-			continue;
+		}
 
-		irq_data = irq_domain_get_irq_data(domain, desc->irq);
+		irq_data = irq_domain_get_irq_data(domain, i);
 		if (!can_reserve) {
 			irqd_clr_can_reserve(irq_data);
 			if (domain->flags & IRQ_DOMAIN_MSI_NOMASK_QUIRK)
@@ -463,28 +463,24 @@ int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,
 			goto cleanup;
 	}
 
+skip_activate:
 	/*
 	 * If these interrupts use reservation mode, clear the activated bit
 	 * so request_irq() will assign the final vector.
 	 */
 	if (can_reserve) {
-		for_each_msi_entry(desc, dev) {
-			irq_data = irq_domain_get_irq_data(domain, desc->irq);
+		for_each_msi_vector(desc, i, dev) {
+			irq_data = irq_domain_get_irq_data(domain, i);
 			irqd_clr_activated(irq_data);
 		}
 	}
 	return 0;
 
 cleanup:
-	for_each_msi_entry(desc, dev) {
-		struct irq_data *irqd;
-
-		if (desc->irq == virq)
-			break;
-
-		irqd = irq_domain_get_irq_data(domain, desc->irq);
-		if (irqd_is_activated(irqd))
-			irq_domain_deactivate_irq(irqd);
+	for_each_msi_vector(desc, i, dev) {
+		irq_data = irq_domain_get_irq_data(domain, i);
+		if (irqd_is_activated(irq_data))
+			irq_domain_deactivate_irq(irq_data);
 	}
 	msi_domain_free_irqs(domain, dev);
 	return ret;
diff --git linux-libre-4.19.174-gnu/kernel/kprobes.c linux-libre-4.19.175-gnu/kernel/kprobes.c
index 2161f519d481..6d02b78fde01 100644
--- linux-libre-4.19.174-gnu/kernel/kprobes.c
+++ linux-libre-4.19.175-gnu/kernel/kprobes.c
@@ -1945,6 +1945,10 @@ int register_kretprobe(struct kretprobe *rp)
 	if (!kprobe_on_func_entry(rp->kp.addr, rp->kp.symbol_name, rp->kp.offset))
 		return -EINVAL;
 
+	/* If only rp->kp.addr is specified, check reregistering kprobes */
+	if (rp->kp.addr && check_kprobe_rereg(&rp->kp))
+		return -EINVAL;
+
 	if (kretprobe_blacklist_size) {
 		addr = kprobe_addr(&rp->kp);
 		if (IS_ERR(addr))
diff --git linux-libre-4.19.174-gnu/mm/huge_memory.c linux-libre-4.19.175-gnu/mm/huge_memory.c
index d74afc256c07..cf9e2bbffdc1 100644
--- linux-libre-4.19.174-gnu/mm/huge_memory.c
+++ linux-libre-4.19.175-gnu/mm/huge_memory.c
@@ -2278,7 +2278,7 @@ void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
 	spinlock_t *ptl;
 	struct mm_struct *mm = vma->vm_mm;
 	unsigned long haddr = address & HPAGE_PMD_MASK;
-	bool was_locked = false;
+	bool do_unlock_page = false;
 	pmd_t _pmd;
 
 	mmu_notifier_invalidate_range_start(mm, haddr, haddr + HPAGE_PMD_SIZE);
@@ -2291,7 +2291,6 @@ void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
 	VM_BUG_ON(freeze && !page);
 	if (page) {
 		VM_WARN_ON_ONCE(!PageLocked(page));
-		was_locked = true;
 		if (page != pmd_page(*pmd))
 			goto out;
 	}
@@ -2300,19 +2299,29 @@ repeat:
 	if (pmd_trans_huge(*pmd)) {
 		if (!page) {
 			page = pmd_page(*pmd);
-			if (unlikely(!trylock_page(page))) {
-				get_page(page);
-				_pmd = *pmd;
-				spin_unlock(ptl);
-				lock_page(page);
-				spin_lock(ptl);
-				if (unlikely(!pmd_same(*pmd, _pmd))) {
-					unlock_page(page);
+			/*
+			 * An anonymous page must be locked, to ensure that a
+			 * concurrent reuse_swap_page() sees stable mapcount;
+			 * but reuse_swap_page() is not used on shmem or file,
+			 * and page lock must not be taken when zap_pmd_range()
+			 * calls __split_huge_pmd() while i_mmap_lock is held.
+			 */
+			if (PageAnon(page)) {
+				if (unlikely(!trylock_page(page))) {
+					get_page(page);
+					_pmd = *pmd;
+					spin_unlock(ptl);
+					lock_page(page);
+					spin_lock(ptl);
+					if (unlikely(!pmd_same(*pmd, _pmd))) {
+						unlock_page(page);
+						put_page(page);
+						page = NULL;
+						goto repeat;
+					}
 					put_page(page);
-					page = NULL;
-					goto repeat;
 				}
-				put_page(page);
+				do_unlock_page = true;
 			}
 		}
 		if (PageMlocked(page))
@@ -2322,7 +2331,7 @@ repeat:
 	__split_huge_pmd_locked(vma, pmd, haddr, freeze);
 out:
 	spin_unlock(ptl);
-	if (!was_locked && page)
+	if (do_unlock_page)
 		unlock_page(page);
 	/*
 	 * No need to double call mmu_notifier->invalidate_range() callback.
diff --git linux-libre-4.19.174-gnu/mm/hugetlb.c linux-libre-4.19.175-gnu/mm/hugetlb.c
index 0b60ab396696..df89aed02302 100644
--- linux-libre-4.19.174-gnu/mm/hugetlb.c
+++ linux-libre-4.19.175-gnu/mm/hugetlb.c
@@ -68,6 +68,21 @@ DEFINE_SPINLOCK(hugetlb_lock);
 static int num_fault_mutexes;
 struct mutex *hugetlb_fault_mutex_table ____cacheline_aligned_in_smp;
 
+static inline bool PageHugeFreed(struct page *head)
+{
+	return page_private(head + 4) == -1UL;
+}
+
+static inline void SetPageHugeFreed(struct page *head)
+{
+	set_page_private(head + 4, -1UL);
+}
+
+static inline void ClearPageHugeFreed(struct page *head)
+{
+	set_page_private(head + 4, 0);
+}
+
 /* Forward declaration */
 static int hugetlb_acct_memory(struct hstate *h, long delta);
 
@@ -858,6 +873,7 @@ static void enqueue_huge_page(struct hstate *h, struct page *page)
 	list_move(&page->lru, &h->hugepage_freelists[nid]);
 	h->free_huge_pages++;
 	h->free_huge_pages_node[nid]++;
+	SetPageHugeFreed(page);
 }
 
 static struct page *dequeue_huge_page_node_exact(struct hstate *h, int nid)
@@ -875,6 +891,7 @@ static struct page *dequeue_huge_page_node_exact(struct hstate *h, int nid)
 		return NULL;
 	list_move(&page->lru, &h->hugepage_activelist);
 	set_page_refcounted(page);
+	ClearPageHugeFreed(page);
 	h->free_huge_pages--;
 	h->free_huge_pages_node[nid]--;
 	return page;
@@ -1196,12 +1213,11 @@ struct hstate *size_to_hstate(unsigned long size)
  */
 bool page_huge_active(struct page *page)
 {
-	VM_BUG_ON_PAGE(!PageHuge(page), page);
-	return PageHead(page) && PagePrivate(&page[1]);
+	return PageHeadHuge(page) && PagePrivate(&page[1]);
 }
 
 /* never called for tail page */
-static void set_page_huge_active(struct page *page)
+void set_page_huge_active(struct page *page)
 {
 	VM_BUG_ON_PAGE(!PageHeadHuge(page), page);
 	SetPagePrivate(&page[1]);
@@ -1305,6 +1321,7 @@ static void prep_new_huge_page(struct hstate *h, struct page *page, int nid)
 	set_hugetlb_cgroup(page, NULL);
 	h->nr_huge_pages++;
 	h->nr_huge_pages_node[nid]++;
+	ClearPageHugeFreed(page);
 	spin_unlock(&hugetlb_lock);
 }
 
@@ -1500,6 +1517,7 @@ int dissolve_free_huge_page(struct page *page)
 {
 	int rc = -EBUSY;
 
+retry:
 	/* Not to disrupt normal path by vainly holding hugetlb_lock */
 	if (!PageHuge(page))
 		return 0;
@@ -1516,6 +1534,26 @@ int dissolve_free_huge_page(struct page *page)
 		int nid = page_to_nid(head);
 		if (h->free_huge_pages - h->resv_huge_pages == 0)
 			goto out;
+
+		/*
+		 * We should make sure that the page is already on the free list
+		 * when it is dissolved.
+		 */
+		if (unlikely(!PageHugeFreed(head))) {
+			spin_unlock(&hugetlb_lock);
+			cond_resched();
+
+			/*
+			 * Theoretically, we should return -EBUSY when we
+			 * encounter this race. In fact, we have a chance
+			 * to successfully dissolve the page if we do a
+			 * retry. Because the race window is quite small.
+			 * If we seize this opportunity, it is an optimization
+			 * for increasing the success rate of dissolving page.
+			 */
+			goto retry;
+		}
+
 		/*
 		 * Move PageHWPoison flag from head page to the raw error page,
 		 * which makes any subpages rather than the error page reusable.
@@ -4940,9 +4978,9 @@ bool isolate_huge_page(struct page *page, struct list_head *list)
 {
 	bool ret = true;
 
-	VM_BUG_ON_PAGE(!PageHead(page), page);
 	spin_lock(&hugetlb_lock);
-	if (!page_huge_active(page) || !get_page_unless_zero(page)) {
+	if (!PageHeadHuge(page) || !page_huge_active(page) ||
+	    !get_page_unless_zero(page)) {
 		ret = false;
 		goto unlock;
 	}
diff --git linux-libre-4.19.174-gnu/mm/memblock.c linux-libre-4.19.175-gnu/mm/memblock.c
index bb4e32c6b19e..4f7c5c3c442c 100644
--- linux-libre-4.19.174-gnu/mm/memblock.c
+++ linux-libre-4.19.175-gnu/mm/memblock.c
@@ -234,14 +234,6 @@ __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end,
  *
  * Find @size free area aligned to @align in the specified range and node.
  *
- * When allocation direction is bottom-up, the @start should be greater
- * than the end of the kernel image. Otherwise, it will be trimmed. The
- * reason is that we want the bottom-up allocation just near the kernel
- * image so it is highly likely that the allocated memory and the kernel
- * will reside in the same node.
- *
- * If bottom-up allocation failed, will try to allocate memory top-down.
- *
  * Return:
  * Found address on success, 0 on failure.
  */
@@ -250,8 +242,6 @@ phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size,
 					phys_addr_t end, int nid,
 					enum memblock_flags flags)
 {
-	phys_addr_t kernel_end, ret;
-
 	/* pump up @end */
 	if (end == MEMBLOCK_ALLOC_ACCESSIBLE)
 		end = memblock.current_limit;
@@ -259,40 +249,13 @@ phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size,
 	/* avoid allocating the first page */
 	start = max_t(phys_addr_t, start, PAGE_SIZE);
 	end = max(start, end);
-	kernel_end = __pa_symbol(_end);
-
-	/*
-	 * try bottom-up allocation only when bottom-up mode
-	 * is set and @end is above the kernel image.
-	 */
-	if (memblock_bottom_up() && end > kernel_end) {
-		phys_addr_t bottom_up_start;
-
-		/* make sure we will allocate above the kernel */
-		bottom_up_start = max(start, kernel_end);
 
-		/* ok, try bottom-up allocation first */
-		ret = __memblock_find_range_bottom_up(bottom_up_start, end,
-						      size, align, nid, flags);
-		if (ret)
-			return ret;
-
-		/*
-		 * we always limit bottom-up allocation above the kernel,
-		 * but top-down allocation doesn't have the limit, so
-		 * retrying top-down allocation may succeed when bottom-up
-		 * allocation failed.
-		 *
-		 * bottom-up allocation is expected to be fail very rarely,
-		 * so we use WARN_ONCE() here to see the stack trace if
-		 * fail happens.
-		 */
-		WARN_ONCE(IS_ENABLED(CONFIG_MEMORY_HOTREMOVE),
-			  "memblock: bottom-up allocation failed, memory hotremove may be affected\n");
-	}
-
-	return __memblock_find_range_top_down(start, end, size, align, nid,
-					      flags);
+	if (memblock_bottom_up())
+		return __memblock_find_range_bottom_up(start, end, size, align,
+						       nid, flags);
+	else
+		return __memblock_find_range_top_down(start, end, size, align,
+						      nid, flags);
 }
 
 /**
diff --git linux-libre-4.19.174-gnu/net/ipv4/ip_tunnel.c linux-libre-4.19.175-gnu/net/ipv4/ip_tunnel.c
index 1cad731039c3..bdd073ea300a 100644
--- linux-libre-4.19.174-gnu/net/ipv4/ip_tunnel.c
+++ linux-libre-4.19.175-gnu/net/ipv4/ip_tunnel.c
@@ -330,7 +330,7 @@ static int ip_tunnel_bind_dev(struct net_device *dev)
 	}
 
 	dev->needed_headroom = t_hlen + hlen;
-	mtu -= (dev->hard_header_len + t_hlen);
+	mtu -= t_hlen;
 
 	if (mtu < IPV4_MIN_MTU)
 		mtu = IPV4_MIN_MTU;
@@ -360,7 +360,7 @@ static struct ip_tunnel *ip_tunnel_create(struct net *net,
 	nt = netdev_priv(dev);
 	t_hlen = nt->hlen + sizeof(struct iphdr);
 	dev->min_mtu = ETH_MIN_MTU;
-	dev->max_mtu = IP_MAX_MTU - dev->hard_header_len - t_hlen;
+	dev->max_mtu = IP_MAX_MTU - t_hlen;
 	ip_tunnel_add(itn, nt);
 	return nt;
 
@@ -502,12 +502,11 @@ static int tnl_update_pmtu(struct net_device *dev, struct sk_buff *skb,
 			    const struct iphdr *inner_iph)
 {
 	struct ip_tunnel *tunnel = netdev_priv(dev);
-	int pkt_size = skb->len - tunnel->hlen - dev->hard_header_len;
+	int pkt_size = skb->len - tunnel->hlen;
 	int mtu;
 
 	if (df)
-		mtu = dst_mtu(&rt->dst) - dev->hard_header_len
-					- sizeof(struct iphdr) - tunnel->hlen;
+		mtu = dst_mtu(&rt->dst) - (sizeof(struct iphdr) + tunnel->hlen);
 	else
 		mtu = skb_dst(skb) ? dst_mtu(skb_dst(skb)) : dev->mtu;
 
@@ -935,7 +934,7 @@ int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict)
 {
 	struct ip_tunnel *tunnel = netdev_priv(dev);
 	int t_hlen = tunnel->hlen + sizeof(struct iphdr);
-	int max_mtu = IP_MAX_MTU - dev->hard_header_len - t_hlen;
+	int max_mtu = IP_MAX_MTU - t_hlen;
 
 	if (new_mtu < ETH_MIN_MTU)
 		return -EINVAL;
@@ -1112,10 +1111,9 @@ int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[],
 
 	mtu = ip_tunnel_bind_dev(dev);
 	if (tb[IFLA_MTU]) {
-		unsigned int max = IP_MAX_MTU - dev->hard_header_len - nt->hlen;
+		unsigned int max = IP_MAX_MTU - (nt->hlen + sizeof(struct iphdr));
 
-		mtu = clamp(dev->mtu, (unsigned int)ETH_MIN_MTU,
-			    (unsigned int)(max - sizeof(struct iphdr)));
+		mtu = clamp(dev->mtu, (unsigned int)ETH_MIN_MTU, max);
 	}
 
 	err = dev_set_mtu(dev, mtu);
diff --git linux-libre-4.19.174-gnu/net/lapb/lapb_out.c linux-libre-4.19.175-gnu/net/lapb/lapb_out.c
index eda726e22f64..621c66f00117 100644
--- linux-libre-4.19.174-gnu/net/lapb/lapb_out.c
+++ linux-libre-4.19.175-gnu/net/lapb/lapb_out.c
@@ -87,7 +87,8 @@ void lapb_kick(struct lapb_cb *lapb)
 		skb = skb_dequeue(&lapb->write_queue);
 
 		do {
-			if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
+			skbn = skb_copy(skb, GFP_ATOMIC);
+			if (!skbn) {
 				skb_queue_head(&lapb->write_queue, skb);
 				break;
 			}
diff --git linux-libre-4.19.174-gnu/net/mac80211/driver-ops.c linux-libre-4.19.175-gnu/net/mac80211/driver-ops.c
index f783d1377d9a..9f0f437a09b9 100644
--- linux-libre-4.19.174-gnu/net/mac80211/driver-ops.c
+++ linux-libre-4.19.175-gnu/net/mac80211/driver-ops.c
@@ -128,8 +128,11 @@ int drv_sta_state(struct ieee80211_local *local,
 	} else if (old_state == IEEE80211_STA_AUTH &&
 		   new_state == IEEE80211_STA_ASSOC) {
 		ret = drv_sta_add(local, sdata, &sta->sta);
-		if (ret == 0)
+		if (ret == 0) {
 			sta->uploaded = true;
+			if (rcu_access_pointer(sta->sta.rates))
+				drv_sta_rate_tbl_update(local, sdata, &sta->sta);
+		}
 	} else if (old_state == IEEE80211_STA_ASSOC &&
 		   new_state == IEEE80211_STA_AUTH) {
 		drv_sta_remove(local, sdata, &sta->sta);
diff --git linux-libre-4.19.174-gnu/net/mac80211/rate.c linux-libre-4.19.175-gnu/net/mac80211/rate.c
index 76f303fda3ed..954b932fd7b8 100644
--- linux-libre-4.19.174-gnu/net/mac80211/rate.c
+++ linux-libre-4.19.175-gnu/net/mac80211/rate.c
@@ -941,7 +941,8 @@ int rate_control_set_rates(struct ieee80211_hw *hw,
 	if (old)
 		kfree_rcu(old, rcu_head);
 
-	drv_sta_rate_tbl_update(hw_to_local(hw), sta->sdata, pubsta);
+	if (sta->uploaded)
+		drv_sta_rate_tbl_update(hw_to_local(hw), sta->sdata, pubsta);
 
 	ieee80211_sta_set_expected_throughput(pubsta, sta_get_expected_throughput(sta));
 
diff --git linux-libre-4.19.174-gnu/net/rxrpc/af_rxrpc.c linux-libre-4.19.175-gnu/net/rxrpc/af_rxrpc.c
index 57f835d2442e..fb7e3fffcb5e 100644
--- linux-libre-4.19.174-gnu/net/rxrpc/af_rxrpc.c
+++ linux-libre-4.19.175-gnu/net/rxrpc/af_rxrpc.c
@@ -1010,7 +1010,7 @@ static int __init af_rxrpc_init(void)
 		goto error_security;
 	}
 
-	ret = register_pernet_subsys(&rxrpc_net_ops);
+	ret = register_pernet_device(&rxrpc_net_ops);
 	if (ret)
 		goto error_pernet;
 
@@ -1055,7 +1055,7 @@ error_key_type:
 error_sock:
 	proto_unregister(&rxrpc_proto);
 error_proto:
-	unregister_pernet_subsys(&rxrpc_net_ops);
+	unregister_pernet_device(&rxrpc_net_ops);
 error_pernet:
 	rxrpc_exit_security();
 error_security:
@@ -1077,7 +1077,7 @@ static void __exit af_rxrpc_exit(void)
 	unregister_key_type(&key_type_rxrpc);
 	sock_unregister(PF_RXRPC);
 	proto_unregister(&rxrpc_proto);
-	unregister_pernet_subsys(&rxrpc_net_ops);
+	unregister_pernet_device(&rxrpc_net_ops);
 	ASSERTCMP(atomic_read(&rxrpc_n_tx_skbs), ==, 0);
 	ASSERTCMP(atomic_read(&rxrpc_n_rx_skbs), ==, 0);
 
