10 files changed, 220 insertions, 276 deletions

diff --git a/drivers/pci/controller/pci-ixp4xx.c b/drivers/pci/controller/pci-ixp4xx.c
index 896a45b24236..654ac4a82beb 100644
--- a/drivers/pci/controller/pci-ixp4xx.c
+++ b/drivers/pci/controller/pci-ixp4xx.c
@@ -145,7 +145,7 @@ static int ixp4xx_pci_check_master_abort(struct ixp4xx_pci *p)
 	return 0;
 }
 
-static int ixp4xx_pci_read(struct ixp4xx_pci *p, u32 addr, u32 cmd, u32 *data)
+static int ixp4xx_pci_read_indirect(struct ixp4xx_pci *p, u32 addr, u32 cmd, u32 *data)
 {
 	ixp4xx_writel(p, IXP4XX_PCI_NP_AD, addr);
 
@@ -170,7 +170,7 @@ static int ixp4xx_pci_read(struct ixp4xx_pci *p, u32 addr, u32 cmd, u32 *data)
 	return ixp4xx_pci_check_master_abort(p);
 }
 
-static int ixp4xx_pci_write(struct ixp4xx_pci *p, u32 addr, u32 cmd, u32 data)
+static int ixp4xx_pci_write_indirect(struct ixp4xx_pci *p, u32 addr, u32 cmd, u32 data)
 {
 	ixp4xx_writel(p, IXP4XX_PCI_NP_AD, addr);
 
@@ -308,7 +308,7 @@ static int ixp4xx_pci_read_config(struct pci_bus *bus, unsigned int devfn,
 	dev_dbg(p->dev, "read_config from %d size %d dev %d:%d:%d address: %08x cmd: %08x\n",
 		where, size, bus_num, PCI_SLOT(devfn), PCI_FUNC(devfn), addr, cmd);
 
-	ret = ixp4xx_pci_read(p, addr, cmd, &val);
+	ret = ixp4xx_pci_read_indirect(p, addr, cmd, &val);
 	if (ret)
 		return PCIBIOS_DEVICE_NOT_FOUND;
 
@@ -356,7 +356,7 @@ static int ixp4xx_pci_write_config(struct pci_bus *bus,  unsigned int devfn,
 	dev_dbg(p->dev, "write_config_byte %#x to %d size %d dev %d:%d:%d addr: %08x cmd %08x\n",
 		value, where, size, bus_num, PCI_SLOT(devfn), PCI_FUNC(devfn), addr, cmd);
 
-	ret = ixp4xx_pci_write(p, addr, cmd, val);
+	ret = ixp4xx_pci_write_indirect(p, addr, cmd, val);
 	if (ret)
 		return PCIBIOS_DEVICE_NOT_FOUND;
 
diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c
index e9289d10f822..502eb79cd551 100644
--- a/drivers/pci/endpoint/pci-epf-core.c
+++ b/drivers/pci/endpoint/pci-epf-core.c
@@ -387,17 +387,14 @@ static int pci_epf_device_probe(struct device *dev)
 	return driver->probe(epf);
 }
 
-static int pci_epf_device_remove(struct device *dev)
+static void pci_epf_device_remove(struct device *dev)
 {
-	int ret = 0;
 	struct pci_epf *epf = to_pci_epf(dev);
 	struct pci_epf_driver *driver = to_pci_epf_driver(dev->driver);
 
 	if (driver->remove)
-		ret = driver->remove(epf);
+		driver->remove(epf);
 	epf->driver = NULL;
-
-	return ret;
 }
 
 static struct bus_type pci_epf_bus_type = {
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 9232255c8515..0099a00af361 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -129,93 +129,95 @@ void __weak arch_restore_msi_irqs(struct pci_dev *dev)
 	return default_restore_msi_irqs(dev);
 }
 
-static inline __attribute_const__ u32 msi_mask(unsigned x)
-{
-	/* Don't shift by >= width of type */
-	if (x >= 5)
-		return 0xffffffff;
-	return (1 << (1 << x)) - 1;
-}
-
 /*
  * PCI 2.3 does not specify mask bits for each MSI interrupt.  Attempting to
  * mask all MSI interrupts by clearing the MSI enable bit does not work
  * reliably as devices without an INTx disable bit will then generate a
  * level IRQ which will never be cleared.
  */
-u32 __pci_msi_desc_mask_irq(struct msi_desc *desc, u32 mask, u32 flag)
+static inline __attribute_const__ u32 msi_multi_mask(struct msi_desc *desc)
 {
-	u32 mask_bits = desc->masked;
+	/* Don't shift by >= width of type */
+	if (desc->msi_attrib.multi_cap >= 5)
+		return 0xffffffff;
+	return (1 << (1 << desc->msi_attrib.multi_cap)) - 1;
+}
 
-	if (pci_msi_ignore_mask || !desc->msi_attrib.maskbit)
-		return 0;
+static noinline void pci_msi_update_mask(struct msi_desc *desc, u32 clear, u32 set)
+{
+	raw_spinlock_t *lock = &desc->dev->msi_lock;
+	unsigned long flags;
 
-	mask_bits &= ~mask;
-	mask_bits |= flag;
+	raw_spin_lock_irqsave(lock, flags);
+	desc->msi_mask &= ~clear;
+	desc->msi_mask |= set;
 	pci_write_config_dword(msi_desc_to_pci_dev(desc), desc->mask_pos,
-			       mask_bits);
-
-	return mask_bits;
+			       desc->msi_mask);
+	raw_spin_unlock_irqrestore(lock, flags);
 }
 
-static void msi_mask_irq(struct msi_desc *desc, u32 mask, u32 flag)
+static inline void pci_msi_mask(struct msi_desc *desc, u32 mask)
 {
-	desc->masked = __pci_msi_desc_mask_irq(desc, mask, flag);
+	pci_msi_update_mask(desc, 0, mask);
 }
 
-static void __iomem *pci_msix_desc_addr(struct msi_desc *desc)
+static inline void pci_msi_unmask(struct msi_desc *desc, u32 mask)
 {
-	if (desc->msi_attrib.is_virtual)
-		return NULL;
+	pci_msi_update_mask(desc, mask, 0);
+}
 
-	return desc->mask_base +
-		desc->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE;
+static inline void __iomem *pci_msix_desc_addr(struct msi_desc *desc)
+{
+	return desc->mask_base + desc->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE;
 }
 
 /*
- * This internal function does not flush PCI writes to the device.
- * All users must ensure that they read from the device before either
- * assuming that the device state is up to date, or returning out of this
- * file.  This saves a few milliseconds when initialising devices with lots
- * of MSI-X interrupts.
+ * This internal function does not flush PCI writes to the device.  All
+ * users must ensure that they read from the device before either assuming
+ * that the device state is up to date, or returning out of this file.
+ * It does not affect the msi_desc::msix_ctrl cache either. Use with care!
  */
-u32 __pci_msix_desc_mask_irq(struct msi_desc *desc, u32 flag)
+static void pci_msix_write_vector_ctrl(struct msi_desc *desc, u32 ctrl)
 {
-	u32 mask_bits = desc->masked;
-	void __iomem *desc_addr;
+	void __iomem *desc_addr = pci_msix_desc_addr(desc);
 
-	if (pci_msi_ignore_mask)
-		return 0;
-
-	desc_addr = pci_msix_desc_addr(desc);
-	if (!desc_addr)
-		return 0;
-
-	mask_bits &= ~PCI_MSIX_ENTRY_CTRL_MASKBIT;
-	if (flag & PCI_MSIX_ENTRY_CTRL_MASKBIT)
-		mask_bits |= PCI_MSIX_ENTRY_CTRL_MASKBIT;
+	writel(ctrl, desc_addr + PCI_MSIX_ENTRY_VECTOR_CTRL);
+}
 
-	writel(mask_bits, desc_addr + PCI_MSIX_ENTRY_VECTOR_CTRL);
+static inline void pci_msix_mask(struct msi_desc *desc)
+{
+	desc->msix_ctrl |= PCI_MSIX_ENTRY_CTRL_MASKBIT;
+	pci_msix_write_vector_ctrl(desc, desc->msix_ctrl);
+	/* Flush write to device */
+	readl(desc->mask_base);
+}
 
-	return mask_bits;
+static inline void pci_msix_unmask(struct msi_desc *desc)
+{
+	desc->msix_ctrl &= ~PCI_MSIX_ENTRY_CTRL_MASKBIT;
+	pci_msix_write_vector_ctrl(desc, desc->msix_ctrl);
 }
 
-static void msix_mask_irq(struct msi_desc *desc, u32 flag)
+static void __pci_msi_mask_desc(struct msi_desc *desc, u32 mask)
 {
-	desc->masked = __pci_msix_desc_mask_irq(desc, flag);
+	if (pci_msi_ignore_mask || desc->msi_attrib.is_virtual)
+		return;
+
+	if (desc->msi_attrib.is_msix)
+		pci_msix_mask(desc);
+	else if (desc->msi_attrib.maskbit)
+		pci_msi_mask(desc, mask);
 }
 
-static void msi_set_mask_bit(struct irq_data *data, u32 flag)
+static void __pci_msi_unmask_desc(struct msi_desc *desc, u32 mask)
 {
-	struct msi_desc *desc = irq_data_get_msi_desc(data);
+	if (pci_msi_ignore_mask || desc->msi_attrib.is_virtual)
+		return;
 
-	if (desc->msi_attrib.is_msix) {
-		msix_mask_irq(desc, flag);
-		readl(desc->mask_base);		/* Flush write to device */
-	} else {
-		unsigned offset = data->irq - desc->irq;
-		msi_mask_irq(desc, 1 << offset, flag << offset);
-	}
+	if (desc->msi_attrib.is_msix)
+		pci_msix_unmask(desc);
+	else if (desc->msi_attrib.maskbit)
+		pci_msi_unmask(desc, mask);
 }
 
 /**
@@ -224,7 +226,9 @@ static void msi_set_mask_bit(struct irq_data *data, u32 flag)
  */
 void pci_msi_mask_irq(struct irq_data *data)
 {
-	msi_set_mask_bit(data, 1);
+	struct msi_desc *desc = irq_data_get_msi_desc(data);
+
+	__pci_msi_mask_desc(desc, BIT(data->irq - desc->irq));
 }
 EXPORT_SYMBOL_GPL(pci_msi_mask_irq);
 
@@ -234,7 +238,9 @@ EXPORT_SYMBOL_GPL(pci_msi_mask_irq);
  */
 void pci_msi_unmask_irq(struct irq_data *data)
 {
-	msi_set_mask_bit(data, 0);
+	struct msi_desc *desc = irq_data_get_msi_desc(data);
+
+	__pci_msi_unmask_desc(desc, BIT(data->irq - desc->irq));
 }
 EXPORT_SYMBOL_GPL(pci_msi_unmask_irq);
 
@@ -255,10 +261,8 @@ void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
 	if (entry->msi_attrib.is_msix) {
 		void __iomem *base = pci_msix_desc_addr(entry);
 
-		if (!base) {
-			WARN_ON(1);
+		if (WARN_ON_ONCE(entry->msi_attrib.is_virtual))
 			return;
-		}
 
 		msg->address_lo = readl(base + PCI_MSIX_ENTRY_LOWER_ADDR);
 		msg->address_hi = readl(base + PCI_MSIX_ENTRY_UPPER_ADDR);
@@ -289,13 +293,32 @@ void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
 		/* Don't touch the hardware now */
 	} else if (entry->msi_attrib.is_msix) {
 		void __iomem *base = pci_msix_desc_addr(entry);
+		u32 ctrl = entry->msix_ctrl;
+		bool unmasked = !(ctrl & PCI_MSIX_ENTRY_CTRL_MASKBIT);
 
-		if (!base)
+		if (entry->msi_attrib.is_virtual)
 			goto skip;
 
+		/*
+		 * The specification mandates that the entry is masked
+		 * when the message is modified:
+		 *
+		 * "If software changes the Address or Data value of an
+		 * entry while the entry is unmasked, the result is
+		 * undefined."
+		 */
+		if (unmasked)
+			pci_msix_write_vector_ctrl(entry, ctrl | PCI_MSIX_ENTRY_CTRL_MASKBIT);
+
 		writel(msg->address_lo, base + PCI_MSIX_ENTRY_LOWER_ADDR);
 		writel(msg->address_hi, base + PCI_MSIX_ENTRY_UPPER_ADDR);
 		writel(msg->data, base + PCI_MSIX_ENTRY_DATA);
+
+		if (unmasked)
+			pci_msix_write_vector_ctrl(entry, ctrl);
+
+		/* Ensure that the writes are visible in the device */
+		readl(base + PCI_MSIX_ENTRY_DATA);
 	} else {
 		int pos = dev->msi_cap;
 		u16 msgctl;
@@ -316,6 +339,8 @@ void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
 			pci_write_config_word(dev, pos + PCI_MSI_DATA_32,
 					      msg->data);
 		}
+		/* Ensure that the writes are visible in the device */
+		pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &msgctl);
 	}
 
 skip:
@@ -338,9 +363,7 @@ static void free_msi_irqs(struct pci_dev *dev)
 {
 	struct list_head *msi_list = dev_to_msi_list(&dev->dev);
 	struct msi_desc *entry, *tmp;
-	struct attribute **msi_attrs;
-	struct device_attribute *dev_attr;
-	int i, count = 0;
+	int i;
 
 	for_each_pci_msi_entry(entry, dev)
 		if (entry->irq)
@@ -360,18 +383,7 @@ static void free_msi_irqs(struct pci_dev *dev)
 	}
 
 	if (dev->msi_irq_groups) {
-		sysfs_remove_groups(&dev->dev.kobj, dev->msi_irq_groups);
-		msi_attrs = dev->msi_irq_groups[0]->attrs;
-		while (msi_attrs[count]) {
-			dev_attr = container_of(msi_attrs[count],
-						struct device_attribute, attr);
-			kfree(dev_attr->attr.name);
-			kfree(dev_attr);
-			++count;
-		}
-		kfree(msi_attrs);
-		kfree(dev->msi_irq_groups[0]);
-		kfree(dev->msi_irq_groups);
+		msi_destroy_sysfs(&dev->dev, dev->msi_irq_groups);
 		dev->msi_irq_groups = NULL;
 	}
 }
@@ -408,8 +420,7 @@ static void __pci_restore_msi_state(struct pci_dev *dev)
 	arch_restore_msi_irqs(dev);
 
 	pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);
-	msi_mask_irq(entry, msi_mask(entry->msi_attrib.multi_cap),
-		     entry->masked);
+	pci_msi_update_mask(entry, 0, 0);
 	control &= ~PCI_MSI_FLAGS_QSIZE;
 	control |= (entry->msi_attrib.multiple << 4) | PCI_MSI_FLAGS_ENABLE;
 	pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control);
@@ -440,7 +451,7 @@ static void __pci_restore_msix_state(struct pci_dev *dev)
 
 	arch_restore_msi_irqs(dev);
 	for_each_pci_msi_entry(entry, dev)
-		msix_mask_irq(entry, entry->masked);
+		pci_msix_write_vector_ctrl(entry, entry->msix_ctrl);
 
 	pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_MASKALL, 0);
 }
@@ -452,102 +463,6 @@ void pci_restore_msi_state(struct pci_dev *dev)
 }
 EXPORT_SYMBOL_GPL(pci_restore_msi_state);
 
-static ssize_t msi_mode_show(struct device *dev, struct device_attribute *attr,
-			     char *buf)
-{
-	struct msi_desc *entry;
-	unsigned long irq;
-	int retval;
-
-	retval = kstrtoul(attr->attr.name, 10, &irq);
-	if (retval)
-		return retval;
-
-	entry = irq_get_msi_desc(irq);
-	if (!entry)
-		return -ENODEV;
-
-	return sysfs_emit(buf, "%s\n",
-			  entry->msi_attrib.is_msix ? "msix" : "msi");
-}
-
-static int populate_msi_sysfs(struct pci_dev *pdev)
-{
-	struct attribute **msi_attrs;
-	struct attribute *msi_attr;
-	struct device_attribute *msi_dev_attr;
-	struct attribute_group *msi_irq_group;
-	const struct attribute_group **msi_irq_groups;
-	struct msi_desc *entry;
-	int ret = -ENOMEM;
-	int num_msi = 0;
-	int count = 0;
-	int i;
-
-	/* Determine how many msi entries we have */
-	for_each_pci_msi_entry(entry, pdev)
-		num_msi += entry->nvec_used;
-	if (!num_msi)
-		return 0;
-
-	/* Dynamically create the MSI attributes for the PCI device */
-	msi_attrs = kcalloc(num_msi + 1, sizeof(void *), GFP_KERNEL);
-	if (!msi_attrs)
-		return -ENOMEM;
-	for_each_pci_msi_entry(entry, pdev) {
-		for (i = 0; i < entry->nvec_used; i++) {
-			msi_dev_attr = kzalloc(sizeof(*msi_dev_attr), GFP_KERNEL);
-			if (!msi_dev_attr)
-				goto error_attrs;
-			msi_attrs[count] = &msi_dev_attr->attr;
-
-			sysfs_attr_init(&msi_dev_attr->attr);
-			msi_dev_attr->attr.name = kasprintf(GFP_KERNEL, "%d",
-							    entry->irq + i);
-			if (!msi_dev_attr->attr.name)
-				goto error_attrs;
-			msi_dev_attr->attr.mode = S_IRUGO;
-			msi_dev_attr->show = msi_mode_show;
-			++count;
-		}
-	}
-
-	msi_irq_group = kzalloc(sizeof(*msi_irq_group), GFP_KERNEL);
-	if (!msi_irq_group)
-		goto error_attrs;
-	msi_irq_group->name = "msi_irqs";
-	msi_irq_group->attrs = msi_attrs;
-
-	msi_irq_groups = kcalloc(2, sizeof(void *), GFP_KERNEL);
-	if (!msi_irq_groups)
-		goto error_irq_group;
-	msi_irq_groups[0] = msi_irq_group;
-
-	ret = sysfs_create_groups(&pdev->dev.kobj, msi_irq_groups);
-	if (ret)
-		goto error_irq_groups;
-	pdev->msi_irq_groups = msi_irq_groups;
-
-	return 0;
-
-error_irq_groups:
-	kfree(msi_irq_groups);
-error_irq_group:
-	kfree(msi_irq_group);
-error_attrs:
-	count = 0;
-	msi_attr = msi_attrs[count];
-	while (msi_attr) {
-		msi_dev_attr = container_of(msi_attr, struct device_attribute, attr);
-		kfree(msi_attr->name);
-		kfree(msi_dev_attr);
-		++count;
-		msi_attr = msi_attrs[count];
-	}
-	kfree(msi_attrs);
-	return ret;
-}
-
 static struct msi_desc *
 msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
 {
@@ -581,7 +496,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
 
 	/* Save the initial mask status */
 	if (entry->msi_attrib.maskbit)
-		pci_read_config_dword(dev, entry->mask_pos, &entry->masked);
+		pci_read_config_dword(dev, entry->mask_pos, &entry->msi_mask);
 
 out:
 	kfree(masks);
@@ -592,8 +507,11 @@ static int msi_verify_entries(struct pci_dev *dev)
 {
 	struct msi_desc *entry;
 
+	if (!dev->no_64bit_msi)
+		return 0;
+
 	for_each_pci_msi_entry(entry, dev) {
-		if (entry->msg.address_hi && dev->no_64bit_msi) {
+		if (entry->msg.address_hi) {
 			pci_err(dev, "arch assigned 64-bit MSI address %#x%08x but device only supports 32 bits\n",
 				entry->msg.address_hi, entry->msg.address_lo);
 			return -EIO;
@@ -619,7 +537,6 @@ static int msi_capability_init(struct pci_dev *dev, int nvec,
 {
 	struct msi_desc *entry;
 	int ret;
-	unsigned mask;
 
 	pci_msi_set_enable(dev, 0);	/* Disable MSI during set up */
 
@@ -628,31 +545,23 @@ static int msi_capability_init(struct pci_dev *dev, int nvec,
 		return -ENOMEM;
 
 	/* All MSIs are unmasked by default; mask them all */
-	mask = msi_mask(entry->msi_attrib.multi_cap);
-	msi_mask_irq(entry, mask, mask);
+	pci_msi_mask(entry, msi_multi_mask(entry));
 
 	list_add_tail(&entry->list, dev_to_msi_list(&dev->dev));
 
 	/* Configure MSI capability structure */
 	ret = pci_msi_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSI);
-	if (ret) {
-		msi_mask_irq(entry, mask, ~mask);
-		free_msi_irqs(dev);
-		return ret;
-	}
+	if (ret)
+		goto err;
 
 	ret = msi_verify_entries(dev);
-	if (ret) {
-		msi_mask_irq(entry, mask, ~mask);
-		free_msi_irqs(dev);
-		return ret;
-	}
+	if (ret)
+		goto err;
 
-	ret = populate_msi_sysfs(dev);
-	if (ret) {
-		msi_mask_irq(entry, mask, ~mask);
-		free_msi_irqs(dev);
-		return ret;
+	dev->msi_irq_groups = msi_populate_sysfs(&dev->dev);
+	if (IS_ERR(dev->msi_irq_groups)) {
+		ret = PTR_ERR(dev->msi_irq_groups);
+		goto err;
 	}
 
 	/* Set MSI enabled bits	*/
@@ -663,6 +572,11 @@ static int msi_capability_init(struct pci_dev *dev, int nvec,
 	pcibios_free_irq(dev);
 	dev->irq = entry->irq;
 	return 0;
+
+err:
+	pci_msi_unmask(entry, msi_multi_mask(entry));
+	free_msi_irqs(dev);
+	return ret;
 }
 
 static void __iomem *msix_map_region(struct pci_dev *dev, unsigned nr_entries)
@@ -691,6 +605,7 @@ static int msix_setup_entries(struct pci_dev *dev, void __iomem *base,
 {
 	struct irq_affinity_desc *curmsk, *masks = NULL;
 	struct msi_desc *entry;
+	void __iomem *addr;
 	int ret, i;
 	int vec_count = pci_msix_vec_count(dev);
 
@@ -711,6 +626,7 @@ static int msix_setup_entries(struct pci_dev *dev, void __iomem *base,
 
 		entry->msi_attrib.is_msix	= 1;
 		entry->msi_attrib.is_64		= 1;
+
 		if (entries)
 			entry->msi_attrib.entry_nr = entries[i].entry;
 		else
@@ -722,6 +638,11 @@ static int msix_setup_entries(struct pci_dev *dev, void __iomem *base,
 		entry->msi_attrib.default_irq	= dev->irq;
 		entry->mask_base		= base;
 
+		if (!entry->msi_attrib.is_virtual) {
+			addr = pci_msix_desc_addr(entry);
+			entry->msix_ctrl = readl(addr + PCI_MSIX_ENTRY_VECTOR_CTRL);
+		}
+
 		list_add_tail(&entry->list, dev_to_msi_list(&dev->dev));
 		if (masks)
 			curmsk++;
@@ -732,26 +653,28 @@ out:
 	return ret;
 }
 
-static void msix_program_entries(struct pci_dev *dev,
-				 struct msix_entry *entries)
+static void msix_update_entries(struct pci_dev *dev, struct msix_entry *entries)
 {
 	struct msi_desc *entry;
-	int i = 0;
-	void __iomem *desc_addr;
 
 	for_each_pci_msi_entry(entry, dev) {
-		if (entries)
-			entries[i++].vector = entry->irq;
+		if (entries) {
+			entries->vector = entry->irq;
+			entries++;
+		}
+	}
+}
 
-		desc_addr = pci_msix_desc_addr(entry);
-		if (desc_addr)
-			entry->masked = readl(desc_addr +
-					      PCI_MSIX_ENTRY_VECTOR_CTRL);
-		else
-			entry->masked = 0;
+static void msix_mask_all(void __iomem *base, int tsize)
+{
+	u32 ctrl = PCI_MSIX_ENTRY_CTRL_MASKBIT;
+	int i;
 
-		msix_mask_irq(entry, 1);
-	}
+	if (pci_msi_ignore_mask)
+		return;
+
+	for (i = 0; i < tsize; i++, base += PCI_MSIX_ENTRY_SIZE)
+		writel(ctrl, base + PCI_MSIX_ENTRY_VECTOR_CTRL);
 }
 
 /**
@@ -768,22 +691,33 @@ static void msix_program_entries(struct pci_dev *dev,
 static int msix_capability_init(struct pci_dev *dev, struct msix_entry *entries,
 				int nvec, struct irq_affinity *affd)
 {
-	int ret;
-	u16 control;
 	void __iomem *base;
+	int ret, tsize;
+	u16 control;
 
-	/* Ensure MSI-X is disabled while it is set up */
-	pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_ENABLE, 0);
+	/*
+	 * Some devices require MSI-X to be enabled before the MSI-X
+	 * registers can be accessed.  Mask all the vectors to prevent
+	 * interrupts coming in before they're fully set up.
+	 */
+	pci_msix_clear_and_set_ctrl(dev, 0, PCI_MSIX_FLAGS_MASKALL |
+				    PCI_MSIX_FLAGS_ENABLE);
 
 	pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &control);
 	/* Request & Map MSI-X table region */
-	base = msix_map_region(dev, msix_table_size(control));
-	if (!base)
-		return -ENOMEM;
+	tsize = msix_table_size(control);
+	base = msix_map_region(dev, tsize);
+	if (!base) {
+		ret = -ENOMEM;
+		goto out_disable;
+	}
+
+	/* Ensure that all table entries are masked. */
+	msix_mask_all(base, tsize);
 
 	ret = msix_setup_entries(dev, base, entries, nvec, affd);
 	if (ret)
-		return ret;
+		goto out_disable;
 
 	ret = pci_msi_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSIX);
 	if (ret)
@@ -794,19 +728,13 @@ static int msix_capability_init(struct pci_dev *dev, struct msix_entry *entries,
 	if (ret)
 		goto out_free;
 
-	/*
-	 * Some devices require MSI-X to be enabled before we can touch the
-	 * MSI-X registers.  We need to mask all the vectors to prevent
-	 * interrupts coming in before they're fully set up.
-	 */
-	pci_msix_clear_and_set_ctrl(dev, 0,
-				PCI_MSIX_FLAGS_MASKALL | PCI_MSIX_FLAGS_ENABLE);
-
-	msix_program_entries(dev, entries);
+	msix_update_entries(dev, entries);
 
-	ret = populate_msi_sysfs(dev);
-	if (ret)
+	dev->msi_irq_groups = msi_populate_sysfs(&dev->dev);
+	if (IS_ERR(dev->msi_irq_groups)) {
+		ret = PTR_ERR(dev->msi_irq_groups);
 		goto out_free;
+	}
 
 	/* Set MSI-X enabled bits and unmask the function */
 	pci_intx_for_msi(dev, 0);
@@ -836,6 +764,9 @@ out_avail:
 out_free:
 	free_msi_irqs(dev);
 
+out_disable:
+	pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_ENABLE, 0);
+
 	return ret;
 }
 
@@ -916,7 +847,6 @@ EXPORT_SYMBOL(pci_msi_vec_count);
 static void pci_msi_shutdown(struct pci_dev *dev)
 {
 	struct msi_desc *desc;
-	u32 mask;
 
 	if (!pci_msi_enable || !dev || !dev->msi_enabled)
 		return;
@@ -929,9 +859,7 @@ static void pci_msi_shutdown(struct pci_dev *dev)
 	dev->msi_enabled = 0;
 
 	/* Return the device with MSI unmasked as initial states */
-	mask = msi_mask(desc->msi_attrib.multi_cap);
-	/* Keep cached state to be restored */
-	__pci_msi_desc_mask_irq(desc, mask, ~mask);
+	pci_msi_unmask(desc, msi_multi_mask(desc));
 
 	/* Restore dev->irq to its default pin-assertion IRQ */
 	dev->irq = desc->msi_attrib.default_irq;
@@ -1016,10 +944,8 @@ static void pci_msix_shutdown(struct pci_dev *dev)
 	}
 
 	/* Return the device with MSI-X masked as initial states */
-	for_each_pci_msi_entry(entry, dev) {
-		/* Keep cached states to be restored */
-		__pci_msix_desc_mask_irq(entry, 1);
-	}
+	for_each_pci_msi_entry(entry, dev)
+		pci_msix_mask(entry);
 
 	pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_ENABLE, 0);
 	pci_intx_for_msi(dev, 1);
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 123c590ebe1d..2761ab86490d 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -454,7 +454,7 @@ static int pci_device_probe(struct device *dev)
 	return error;
 }
 
-static int pci_device_remove(struct device *dev)
+static void pci_device_remove(struct device *dev)
 {
 	struct pci_dev *pci_dev = to_pci_dev(dev);
 	struct pci_driver *drv = pci_dev->driver;
@@ -490,7 +490,6 @@ static int pci_device_remove(struct device *dev)
 	 */
 
 	pci_dev_put(pci_dev);
-	return 0;
 }
 
 static void pci_device_shutdown(struct device *dev)
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 5d63df7c1820..b70f61fbcd4b 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -965,7 +965,7 @@ void pci_create_legacy_files(struct pci_bus *b)
 	b->legacy_io->read = pci_read_legacy_io;
 	b->legacy_io->write = pci_write_legacy_io;
 	b->legacy_io->mmap = pci_mmap_legacy_io;
-	b->legacy_io->mapping = iomem_get_mapping();
+	b->legacy_io->f_mapping = iomem_get_mapping;
 	pci_adjust_legacy_attr(b, pci_mmap_io);
 	error = device_create_bin_file(&b->dev, b->legacy_io);
 	if (error)
@@ -978,7 +978,7 @@ void pci_create_legacy_files(struct pci_bus *b)
 	b->legacy_mem->size = 1024*1024;
 	b->legacy_mem->attr.mode = 0600;
 	b->legacy_mem->mmap = pci_mmap_legacy_mem;
-	b->legacy_io->mapping = iomem_get_mapping();
+	b->legacy_mem->f_mapping = iomem_get_mapping;
 	pci_adjust_legacy_attr(b, pci_mmap_mem);
 	error = device_create_bin_file(&b->dev, b->legacy_mem);
 	if (error)
@@ -1195,7 +1195,7 @@ static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine)
 		}
 	}
 	if (res_attr->mmap)
-		res_attr->mapping = iomem_get_mapping();
+		res_attr->f_mapping = iomem_get_mapping;
 	res_attr->attr.name = res_attr_name;
 	res_attr->attr.mode = 0600;
 	res_attr->size = pci_resource_len(pdev, num);
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index aacf575c15cf..a5e6759c407b 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1906,11 +1906,7 @@ static int pci_enable_device_flags(struct pci_dev *dev, unsigned long flags)
 	 * so that things like MSI message writing will behave as expected
 	 * (e.g. if the device really is in D0 at enable time).
 	 */
-	if (dev->pm_cap) {
-		u16 pmcsr;
-		pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
-		dev->current_state = (pmcsr & PCI_PM_CTRL_STATE_MASK);
-	}
+	pci_update_current_state(dev, dev->current_state);
 
 	if (atomic_inc_return(&dev->enable_cnt) > 1)
 		return 0;		/* already enabled */
@@ -2495,7 +2491,14 @@ static int __pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable
 	if (enable) {
 		int error;
 
-		if (pci_pme_capable(dev, state))
+		/*
+		 * Enable PME signaling if the device can signal PME from
+		 * D3cold regardless of whether or not it can signal PME from
+		 * the current target state, because that will allow it to
+		 * signal PME when the hierarchy above it goes into D3cold and
+		 * the device itself ends up in D3cold as a result of that.
+		 */
+		if (pci_pme_capable(dev, state) || pci_pme_capable(dev, PCI_D3cold))
 			pci_pme_active(dev, true);
 		else
 			ret = 1;
@@ -2599,16 +2602,20 @@ static pci_power_t pci_target_state(struct pci_dev *dev, bool wakeup)
 	if (dev->current_state == PCI_D3cold)
 		target_state = PCI_D3cold;
 
-	if (wakeup) {
+	if (wakeup && dev->pme_support) {
+		pci_power_t state = target_state;
+
 		/*
 		 * Find the deepest state from which the device can generate
 		 * PME#.
 		 */
-		if (dev->pme_support) {
-			while (target_state
-			      && !(dev->pme_support & (1 << target_state)))
-				target_state--;
-		}
+		while (state && !(dev->pme_support & (1 << state)))
+			state--;
+
+		if (state)
+			return state;
+		else if (dev->pme_support & 1)
+			return PCI_D0;
 	}
 
 	return target_state;
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 93dcdd431072..2f52110cac97 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -597,11 +597,8 @@ static inline void pcie_ecrc_get_policy(char *str) { }
 
 #ifdef CONFIG_PCIE_PTM
 void pci_ptm_init(struct pci_dev *dev);
-int pci_enable_ptm(struct pci_dev *dev, u8 *granularity);
 #else
 static inline void pci_ptm_init(struct pci_dev *dev) { }
-static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
-{ return -EINVAL; }
 #endif
 
 struct pci_dev_reset_methods {
diff --git a/drivers/pci/pcie/ptm.c b/drivers/pci/pcie/ptm.c
index 95d4eef2c9e8..8a4ad974c5ac 100644
--- a/drivers/pci/pcie/ptm.c
+++ b/drivers/pci/pcie/ptm.c
@@ -204,3 +204,12 @@ int pci_enable_ptm(struct pci_dev *dev, u8 *granularity)
 	return 0;
 }
 EXPORT_SYMBOL(pci_enable_ptm);
+
+bool pcie_ptm_enabled(struct pci_dev *dev)
+{
+	if (!dev)
+		return false;
+
+	return dev->ptm_enabled;
+}
+EXPORT_SYMBOL(pcie_ptm_enabled);
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 6d74386eadc2..ab3de1551b50 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1900,6 +1900,7 @@ static void quirk_ryzen_xhci_d3hot(struct pci_dev *dev)
 }
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15e0, quirk_ryzen_xhci_d3hot);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15e1, quirk_ryzen_xhci_d3hot);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1639, quirk_ryzen_xhci_d3hot);
 
 #ifdef CONFIG_X86_IO_APIC
 static int dmi_disable_ioapicreroute(const struct dmi_system_id *d)
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index b7a8f3a1921f..427041c1e408 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -115,7 +115,7 @@ static int do_pci_op(struct pcifront_device *pdev, struct xen_pci_op *op)
 	struct xen_pci_op *active_op = &pdev->sh_info->op;
 	unsigned long irq_flags;
 	evtchn_port_t port = pdev->evtchn;
-	unsigned irq = pdev->irq;
+	unsigned int irq = pdev->irq;
 	s64 ns, ns_timeout;
 
 	spin_lock_irqsave(&pdev->sh_info_lock, irq_flags);
@@ -153,10 +153,10 @@ static int do_pci_op(struct pcifront_device *pdev, struct xen_pci_op *op)
 	}
 
 	/*
-	* We might lose backend service request since we
-	* reuse same evtchn with pci_conf backend response. So re-schedule
-	* aer pcifront service.
-	*/
+	 * We might lose backend service request since we
+	 * reuse same evtchn with pci_conf backend response. So re-schedule
+	 * aer pcifront service.
+	 */
 	if (test_bit(_XEN_PCIB_active,
 			(unsigned long *)&pdev->sh_info->flags)) {
 		dev_err(&pdev->xdev->dev,
@@ -414,7 +414,8 @@ static int pcifront_scan_bus(struct pcifront_device *pdev,
 	struct pci_dev *d;
 	unsigned int devfn;
 
-	/* Scan the bus for functions and add.
+	/*
+	 * Scan the bus for functions and add.
 	 * We omit handling of PCI bridge attachment because pciback prevents
 	 * bridges from being exported.
 	 */
@@ -492,8 +493,10 @@ static int pcifront_scan_root(struct pcifront_device *pdev,
 
 	list_add(&bus_entry->list, &pdev->root_buses);
 
-	/* pci_scan_root_bus skips devices which do not have a
-	* devfn==0. The pcifront_scan_bus enumerates all devfn. */
+	/*
+	 * pci_scan_root_bus skips devices which do not have a
+	 * devfn==0. The pcifront_scan_bus enumerates all devfn.
+	 */
 	err = pcifront_scan_bus(pdev, domain, bus, b);
 
 	/* Claim resources before going "live" with our devices */
@@ -651,8 +654,10 @@ static void pcifront_do_aer(struct work_struct *data)
 	pci_channel_state_t state =
 		(pci_channel_state_t)pdev->sh_info->aer_op.err;
 
-	/*If a pci_conf op is in progress,
-		we have to wait until it is done before service aer op*/
+	/*
+	 * If a pci_conf op is in progress, we have to wait until it is done
+	 * before service aer op
+	 */
 	dev_dbg(&pdev->xdev->dev,
 		"pcifront service aer bus %x devfn %x\n",
 		pdev->sh_info->aer_op.bus, pdev->sh_info->aer_op.devfn);
@@ -676,6 +681,7 @@ static void pcifront_do_aer(struct work_struct *data)
 static irqreturn_t pcifront_handler_aer(int irq, void *dev)
 {
 	struct pcifront_device *pdev = dev;
+
 	schedule_pcifront_aer_op(pdev);
 	return IRQ_HANDLED;
 }
@@ -1027,6 +1033,7 @@ static int pcifront_detach_devices(struct pcifront_device *pdev)
 	/* Find devices being detached and remove them. */
 	for (i = 0; i < num_devs; i++) {
 		int l, state;
+
 		l = snprintf(str, sizeof(str), "state-%d", i);
 		if (unlikely(l >= (sizeof(str) - 1))) {
 			err = -ENOMEM;
@@ -1078,7 +1085,7 @@ out:
 	return err;
 }
 
-static void __ref pcifront_backend_changed(struct xenbus_device *xdev,
+static void pcifront_backend_changed(struct xenbus_device *xdev,
 						  enum xenbus_state be_state)
 {
 	struct pcifront_device *pdev = dev_get_drvdata(&xdev->dev);
@@ -1137,6 +1144,7 @@ out:
 static int pcifront_xenbus_remove(struct xenbus_device *xdev)
 {
 	struct pcifront_device *pdev = dev_get_drvdata(&xdev->dev);
+
 	if (pdev)
 		free_pdev(pdev);