Merge tag 'v4.9.144' into 4.9-2.3.x-imx

This is the 4.9.144 stable release

3 files changed, 30 insertions, 12 deletions

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 0e9a9dbeb184..37f393f27efc 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -981,7 +981,6 @@ static int __pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries,
 			}
 		}
 	}
-	WARN_ON(!!dev->msix_enabled);
 
 	/* Check whether driver already requested for MSI irq */
 	if (dev->msi_enabled) {
@@ -1068,8 +1067,6 @@ static int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec,
 	if (!pci_msi_supported(dev, minvec))
 		return -EINVAL;
 
-	WARN_ON(!!dev->msi_enabled);
-
 	/* Check whether driver already requested MSI-X irqs */
 	if (dev->msix_enabled) {
 		dev_info(&dev->dev,
@@ -1080,6 +1077,9 @@ static int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec,
 	if (maxvec < minvec)
 		return -ERANGE;
 
+	if (WARN_ON_ONCE(dev->msi_enabled))
+		return -EINVAL;
+
 	nvec = pci_msi_vec_count(dev);
 	if (nvec < 0)
 		return nvec;
@@ -1138,6 +1138,9 @@ static int __pci_enable_msix_range(struct pci_dev *dev,
 	if (maxvec < minvec)
 		return -ERANGE;
 
+	if (WARN_ON_ONCE(dev->msix_enabled))
+		return -EINVAL;
+
 	for (;;) {
 		if (affinity) {
 			nvec = irq_calc_affinity_vectors(dev->irq_affinity,
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 605922e01c45..37f2053c31de 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1114,12 +1114,12 @@ int pci_save_state(struct pci_dev *dev)
 EXPORT_SYMBOL(pci_save_state);
 
 static void pci_restore_config_dword(struct pci_dev *pdev, int offset,
-				     u32 saved_val, int retry)
+				     u32 saved_val, int retry, bool force)
 {
 	u32 val;
 
 	pci_read_config_dword(pdev, offset, &val);
-	if (val == saved_val)
+	if (!force && val == saved_val)
 		return;
 
 	for (;;) {
@@ -1138,25 +1138,36 @@ static void pci_restore_config_dword(struct pci_dev *pdev, int offset,
 }
 
 static void pci_restore_config_space_range(struct pci_dev *pdev,
-					   int start, int end, int retry)
+					   int start, int end, int retry,
+					   bool force)
 {
 	int index;
 
 	for (index = end; index >= start; index--)
 		pci_restore_config_dword(pdev, 4 * index,
 					 pdev->saved_config_space[index],
-					 retry);
+					 retry, force);
 }
 
 static void pci_restore_config_space(struct pci_dev *pdev)
 {
 	if (pdev->hdr_type == PCI_HEADER_TYPE_NORMAL) {
-		pci_restore_config_space_range(pdev, 10, 15, 0);
+		pci_restore_config_space_range(pdev, 10, 15, 0, false);
 		/* Restore BARs before the command register. */
-		pci_restore_config_space_range(pdev, 4, 9, 10);
-		pci_restore_config_space_range(pdev, 0, 3, 0);
+		pci_restore_config_space_range(pdev, 4, 9, 10, false);
+		pci_restore_config_space_range(pdev, 0, 3, 0, false);
+	} else if (pdev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
+		pci_restore_config_space_range(pdev, 12, 15, 0, false);
+
+		/*
+		 * Force rewriting of prefetch registers to avoid S3 resume
+		 * issues on Intel PCI bridges that occur when these
+		 * registers are not explicitly written.
+		 */
+		pci_restore_config_space_range(pdev, 9, 11, 0, true);
+		pci_restore_config_space_range(pdev, 0, 8, 0, false);
 	} else {
-		pci_restore_config_space_range(pdev, 0, 15, 0);
+		pci_restore_config_space_range(pdev, 0, 15, 0, false);
 	}
 }
 
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index c7a695c2303a..dedb12083d86 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1634,8 +1634,8 @@ static void quirk_pcie_mch(struct pci_dev *pdev)
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_E7520_MCH,	quirk_pcie_mch);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_E7320_MCH,	quirk_pcie_mch);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_E7525_MCH,	quirk_pcie_mch);
-DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_HUAWEI,	0x1610,	quirk_pcie_mch);
 
+DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_HUAWEI, 0x1610, PCI_CLASS_BRIDGE_PCI, 8, quirk_pcie_mch);
 
 /*
  * It's possible for the MSI to get corrupted if shpc and acpi
@@ -3124,7 +3124,11 @@ static void disable_igfx_irq(struct pci_dev *dev)
 
 	pci_iounmap(dev, regs);
 }
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0042, disable_igfx_irq);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0046, disable_igfx_irq);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x004a, disable_igfx_irq);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0102, disable_igfx_irq);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0106, disable_igfx_irq);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x010a, disable_igfx_irq);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0152, disable_igfx_irq);