Merge branch 'pci/misc'

  - Mark expected switch fall-throughs (Gustavo A. R. Silva)

  - Remove unused pci_request_region_exclusive() (Johannes Thumshirn)

  - Fix x86 PCI IRQ routing table memory leak (Wenwen Wang)

  - Reset Lenovo ThinkPad P50 if firmware didn't do it on reboot (Lyude
    Paul)

  - Add and use pci_dev_id() helper to simplify PCI_DEVID() usage (touches
    several places outside drivers/pci/) (Heiner Kallweit)

  - Transition Mobiveil PCI maintenance to Karthikeyan M and Hou Zhiqiang
    (Subrahmanya Lingappa)

* pci/misc:
  MAINTAINERS: Add Karthikeyan Mitran and Hou Zhiqiang for Mobiveil PCI
  platform/chrome: chromeos_laptop: use pci_dev_id() helper
  stmmac: pci: Use pci_dev_id() helper
  iommu/vt-d: Use pci_dev_id() helper
  iommu/amd: Use pci_dev_id() helper
  drm/amdkfd: Use pci_dev_id() helper
  powerpc/powernv/npu: Use pci_dev_id() helper
  r8169: use pci_dev_id() helper
  PCI: Add pci_dev_id() helper
  PCI: Reset Lenovo ThinkPad P50 nvgpu at boot if necessary
  x86/PCI: Fix PCI IRQ routing table memory leak
  PCI: Remove unused pci_request_region_exclusive()
  PCI: Mark expected switch fall-throughs

13 files changed, 73 insertions, 45 deletions

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
index 09da91644f9f..b0c59a313049 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
@@ -1270,8 +1270,7 @@ int kfd_topology_add_device(struct kfd_dev *gpu)
 
 	dev->node_props.vendor_id = gpu->pdev->vendor;
 	dev->node_props.device_id = gpu->pdev->device;
-	dev->node_props.location_id = PCI_DEVID(gpu->pdev->bus->number,
-		gpu->pdev->devfn);
+	dev->node_props.location_id = pci_dev_id(gpu->pdev);
 	dev->node_props.max_engine_clk_fcompute =
 		amdgpu_amdkfd_get_max_engine_clock_in_mhz(dev->gpu->kgd);
 	dev->node_props.max_engine_clk_ccompute =
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index b319e51c379b..8e8121b14c36 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -165,7 +165,7 @@ static inline u16 get_pci_device_id(struct device *dev)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
 
-	return PCI_DEVID(pdev->bus->number, pdev->devfn);
+	return pci_dev_id(pdev);
 }
 
 static inline int get_acpihid_device_id(struct device *dev,
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 87274b54febd..a772dedb05b9 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -1391,7 +1391,7 @@ static void iommu_enable_dev_iotlb(struct device_domain_info *info)
 
 		/* pdev will be returned if device is not a vf */
 		pf_pdev = pci_physfn(pdev);
-		info->pfsid = PCI_DEVID(pf_pdev->bus->number, pf_pdev->devfn);
+		info->pfsid = pci_dev_id(pf_pdev);
 	}
 
 #ifdef CONFIG_INTEL_IOMMU_SVM
diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index 2d74641b7f7b..871458b873be 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -424,7 +424,7 @@ static int set_msi_sid(struct irte *irte, struct pci_dev *dev)
 		set_irte_sid(irte, SVT_VERIFY_SID_SQ, SQ_ALL_16, data.alias);
 	else
 		set_irte_sid(irte, SVT_VERIFY_SID_SQ, SQ_ALL_16,
-			     PCI_DEVID(dev->bus->number, dev->devfn));
+			     pci_dev_id(dev));
 
 	return 0;
 }
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index c29dde064078..65eb095f94b8 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -7182,8 +7182,7 @@ static int r8169_mdio_register(struct rtl8169_private *tp)
 	new_bus->priv = tp;
 	new_bus->parent = &pdev->dev;
 	new_bus->irq[0] = PHY_IGNORE_INTERRUPT;
-	snprintf(new_bus->id, MII_BUS_ID_SIZE, "r8169-%x",
-		 PCI_DEVID(pdev->bus->number, pdev->devfn));
+	snprintf(new_bus->id, MII_BUS_ID_SIZE, "r8169-%x", pci_dev_id(pdev));
 
 	new_bus->read = r8169_mdio_read_reg;
 	new_bus->write = r8169_mdio_write_reg;
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
index d819e8eaba12..5cdc17381c80 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
@@ -204,7 +204,7 @@ static int quark_default_data(struct pci_dev *pdev,
 		ret = 1;
 	}
 
-	plat->bus_id = PCI_DEVID(pdev->bus->number, pdev->devfn);
+	plat->bus_id = pci_dev_id(pdev);
 	plat->phy_addr = ret;
 	plat->interface = PHY_INTERFACE_MODE_RMII;
 
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 73986825d221..e039b740fe74 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -1338,7 +1338,7 @@ irq_hw_number_t pci_msi_domain_calc_hwirq(struct pci_dev *dev,
 					  struct msi_desc *desc)
 {
 	return (irq_hw_number_t)desc->msi_attrib.entry_nr |
-		PCI_DEVID(dev->bus->number, dev->devfn) << 11 |
+		pci_dev_id(dev) << 11 |
 		(pci_domain_nr(dev->bus) & 0xFFFFFFFF) << 27;
 }
 
@@ -1508,7 +1508,7 @@ static int get_msi_id_cb(struct pci_dev *pdev, u16 alias, void *data)
 u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev)
 {
 	struct device_node *of_node;
-	u32 rid = PCI_DEVID(pdev->bus->number, pdev->devfn);
+	u32 rid = pci_dev_id(pdev);
 
 	pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid);
 
@@ -1531,7 +1531,7 @@ u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev)
 struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev)
 {
 	struct irq_domain *dom;
-	u32 rid = PCI_DEVID(pdev->bus->number, pdev->devfn);
+	u32 rid = pci_dev_id(pdev);
 
 	pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid);
 	dom = of_msi_map_get_device_domain(&pdev->dev, rid);
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 7c1b362f599a..d185b49e105a 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3707,31 +3707,6 @@ int pci_request_region(struct pci_dev *pdev, int bar, const char *res_name)
 EXPORT_SYMBOL(pci_request_region);
 
 /**
- *	pci_request_region_exclusive - Reserved PCI I/O and memory resource
- *	@pdev: PCI device whose resources are to be reserved
- *	@bar: BAR to be reserved
- *	@res_name: Name to be associated with resource.
- *
- *	Mark the PCI region associated with PCI device @pdev BR @bar as
- *	being reserved by owner @res_name.  Do not access any
- *	address inside the PCI regions unless this call returns
- *	successfully.
- *
- *	Returns 0 on success, or %EBUSY on error.  A warning
- *	message is also printed on failure.
- *
- *	The key difference that _exclusive makes it that userspace is
- *	explicitly not allowed to map the resource via /dev/mem or
- *	sysfs.
- */
-int pci_request_region_exclusive(struct pci_dev *pdev, int bar,
-				 const char *res_name)
-{
-	return __pci_request_region(pdev, bar, res_name, IORESOURCE_EXCLUSIVE);
-}
-EXPORT_SYMBOL(pci_request_region_exclusive);
-
-/**
  * pci_release_selected_regions - Release selected PCI I/O and memory resources
  * @pdev: PCI device whose resources were previously reserved
  * @bars: Bitmask of BARs to be released
diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c
index 6fa1627ce08d..445b51db75b0 100644
--- a/drivers/pci/proc.c
+++ b/drivers/pci/proc.c
@@ -222,6 +222,7 @@ static long proc_bus_pci_ioctl(struct file *file, unsigned int cmd,
 		}
 		/* If arch decided it can't, fall through... */
 #endif /* HAVE_PCI_MMAP */
+		/* fall through */
 	default:
 		ret = -EINVAL;
 		break;
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 6f34e17c98f4..98c9c47f9d0e 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -5137,3 +5137,61 @@ SWITCHTEC_QUIRK(0x8573);  /* PFXI 48XG3 */
 SWITCHTEC_QUIRK(0x8574);  /* PFXI 64XG3 */
 SWITCHTEC_QUIRK(0x8575);  /* PFXI 80XG3 */
 SWITCHTEC_QUIRK(0x8576);  /* PFXI 96XG3 */
+
+/*
+ * On Lenovo Thinkpad P50 SKUs with a Nvidia Quadro M1000M, the BIOS does
+ * not always reset the secondary Nvidia GPU between reboots if the system
+ * is configured to use Hybrid Graphics mode.  This results in the GPU
+ * being left in whatever state it was in during the *previous* boot, which
+ * causes spurious interrupts from the GPU, which in turn causes us to
+ * disable the wrong IRQ and end up breaking the touchpad.  Unsurprisingly,
+ * this also completely breaks nouveau.
+ *
+ * Luckily, it seems a simple reset of the Nvidia GPU brings it back to a
+ * clean state and fixes all these issues.
+ *
+ * When the machine is configured in Dedicated display mode, the issue
+ * doesn't occur.  Fortunately the GPU advertises NoReset+ when in this
+ * mode, so we can detect that and avoid resetting it.
+ */
+static void quirk_reset_lenovo_thinkpad_p50_nvgpu(struct pci_dev *pdev)
+{
+	void __iomem *map;
+	int ret;
+
+	if (pdev->subsystem_vendor != PCI_VENDOR_ID_LENOVO ||
+	    pdev->subsystem_device != 0x222e ||
+	    !pdev->reset_fn)
+		return;
+
+	if (pci_enable_device_mem(pdev))
+		return;
+
+	/*
+	 * Based on nvkm_device_ctor() in
+	 * drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
+	 */
+	map = pci_iomap(pdev, 0, 0x23000);
+	if (!map) {
+		pci_err(pdev, "Can't map MMIO space\n");
+		goto out_disable;
+	}
+
+	/*
+	 * Make sure the GPU looks like it's been POSTed before resetting
+	 * it.
+	 */
+	if (ioread32(map + 0x2240c) & 0x2) {
+		pci_info(pdev, FW_BUG "GPU left initialized by EFI, resetting\n");
+		ret = pci_reset_function(pdev);
+		if (ret < 0)
+			pci_err(pdev, "Failed to reset GPU: %d\n", ret);
+	}
+
+	iounmap(map);
+out_disable:
+	pci_disable_device(pdev);
+}
+DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, 0x13b1,
+			      PCI_CLASS_DISPLAY_VGA, 8,
+			      quirk_reset_lenovo_thinkpad_p50_nvgpu);
diff --git a/drivers/pci/search.c b/drivers/pci/search.c
index 2b5f720862d3..5c7922612733 100644
--- a/drivers/pci/search.c
+++ b/drivers/pci/search.c
@@ -33,7 +33,7 @@ int pci_for_each_dma_alias(struct pci_dev *pdev,
 	struct pci_bus *bus;
 	int ret;
 
-	ret = fn(pdev, PCI_DEVID(pdev->bus->number, pdev->devfn), data);
+	ret = fn(pdev, pci_dev_id(pdev), data);
 	if (ret)
 		return ret;
 
@@ -88,9 +88,7 @@ int pci_for_each_dma_alias(struct pci_dev *pdev,
 					return ret;
 				continue;
 			case PCI_EXP_TYPE_PCIE_BRIDGE:
-				ret = fn(tmp,
-					 PCI_DEVID(tmp->bus->number,
-						   tmp->devfn), data);
+				ret = fn(tmp, pci_dev_id(tmp), data);
 				if (ret)
 					return ret;
 				continue;
@@ -101,9 +99,7 @@ int pci_for_each_dma_alias(struct pci_dev *pdev,
 					 PCI_DEVID(tmp->subordinate->number,
 						   PCI_DEVFN(0, 0)), data);
 			else
-				ret = fn(tmp,
-					 PCI_DEVID(tmp->bus->number,
-						   tmp->devfn), data);
+				ret = fn(tmp, pci_dev_id(tmp), data);
 			if (ret)
 				return ret;
 		}
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index eba6e33147a2..14cf0f41ecf0 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -1104,7 +1104,7 @@ static void __ref pcifront_backend_changed(struct xenbus_device *xdev,
 	case XenbusStateClosed:
 		if (xdev->state == XenbusStateClosed)
 			break;
-		/* Missed the backend's CLOSING state -- fallthrough */
+		/* fall through - Missed the backend's CLOSING state. */
 	case XenbusStateClosing:
 		dev_warn(&xdev->dev, "backend going away!\n");
 		pcifront_try_disconnect(pdev);
diff --git a/drivers/platform/chrome/chromeos_laptop.c b/drivers/platform/chrome/chromeos_laptop.c
index 24326eecd787..7abbb6167766 100644
--- a/drivers/platform/chrome/chromeos_laptop.c
+++ b/drivers/platform/chrome/chromeos_laptop.c
@@ -125,7 +125,7 @@ static bool chromeos_laptop_match_adapter_devid(struct device *dev, u32 devid)
 		return false;
 
 	pdev = to_pci_dev(dev);
-	return devid == PCI_DEVID(pdev->bus->number, pdev->devfn);
+	return devid == pci_dev_id(pdev);
 }
 
 static void chromeos_laptop_check_adapter(struct i2c_adapter *adapter)