Merge branch 'pci/errors'

- Add PCI_ERROR_RESPONSE and related definitions for signaling and checking
  for transaction errors on PCI (Naveen Naidu)

- Fabricate PCI_ERROR_RESPONSE data (~0) in config read wrappers, instead
  of in host controller drivers, when transactions fail on PCI (Naveen
  Naidu)

- Use PCI_POSSIBLE_ERROR() to check for possible failure of config reads
  (Naveen Naidu)

* pci/errors:
  PCI: xgene: Use PCI_ERROR_RESPONSE to identify config read errors
  PCI: hv: Use PCI_ERROR_RESPONSE to identify config read errors
  PCI: keystone: Use PCI_ERROR_RESPONSE to identify config read errors
  PCI: Use PCI_ERROR_RESPONSE to identify config read errors
  PCI: cpqphp: Use PCI_POSSIBLE_ERROR() to check config reads
  PCI/PME: Use PCI_POSSIBLE_ERROR() to check config reads
  PCI/DPC: Use PCI_POSSIBLE_ERROR() to check config reads
  PCI: pciehp: Use PCI_POSSIBLE_ERROR() to check config reads
  PCI: vmd: Use PCI_POSSIBLE_ERROR() to check config reads
  PCI/ERR: Use PCI_POSSIBLE_ERROR() to check config reads
  PCI: rockchip-host: Drop error data fabrication when config read fails
  PCI: rcar-host: Drop error data fabrication when config read fails
  PCI: altera: Drop error data fabrication when config read fails
  PCI: mvebu: Drop error data fabrication when config read fails
  PCI: aardvark: Drop error data fabrication when config read fails
  PCI: kirin: Drop error data fabrication when config read fails
  PCI: histb: Drop error data fabrication when config read fails
  PCI: exynos: Drop error data fabrication when config read fails
  PCI: mediatek: Drop error data fabrication when config read fails
  PCI: iproc: Drop error data fabrication when config read fails
  PCI: thunder: Drop error data fabrication when config read fails
  PCI: Drop error data fabrication when config read fails
  PCI: Use PCI_SET_ERROR_RESPONSE() for disconnected devices
  PCI: Set error response data when config read fails
  PCI: Add PCI_ERROR_RESPONSE and related definitions

1 files changed, 5 insertions, 5 deletions

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index f2ba87b4fc2a..70ceb30bcad6 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -206,14 +206,14 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 	 * memory BAR or a ROM, bit 0 must be clear; if it's an io BAR, bit
 	 * 1 must be clear.
 	 */
-	if (sz == 0xffffffff)
+	if (PCI_POSSIBLE_ERROR(sz))
 		sz = 0;
 
 	/*
 	 * I don't know how l can have all bits set.  Copied from old code.
 	 * Maybe it fixes a bug on some ancient platform.
 	 */
-	if (l == 0xffffffff)
+	if (PCI_POSSIBLE_ERROR(l))
 		l = 0;
 
 	if (type == pci_bar_unknown) {
@@ -1675,7 +1675,7 @@ static int pci_cfg_space_size_ext(struct pci_dev *dev)
 
 	if (pci_read_config_dword(dev, pos, &status) != PCIBIOS_SUCCESSFUL)
 		return PCI_CFG_SPACE_SIZE;
-	if (status == 0xffffffff || pci_ext_cfg_is_aliased(dev))
+	if (PCI_POSSIBLE_ERROR(status) || pci_ext_cfg_is_aliased(dev))
 		return PCI_CFG_SPACE_SIZE;
 
 	return PCI_CFG_SPACE_EXP_SIZE;
@@ -2363,8 +2363,8 @@ bool pci_bus_generic_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *l,
 	if (pci_bus_read_config_dword(bus, devfn, PCI_VENDOR_ID, l))
 		return false;
 
-	/* Some broken boards return 0 or ~0 if a slot is empty: */
-	if (*l == 0xffffffff || *l == 0x00000000 ||
+	/* Some broken boards return 0 or ~0 (PCI_ERROR_RESPONSE) if a slot is empty: */
+	if (PCI_POSSIBLE_ERROR(*l) || *l == 0x00000000 ||
 	    *l == 0x0000ffff || *l == 0xffff0000)
 		return false;