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PCI: Use PCI_ERROR_RESPONSE to identify config read errors

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Include PCI_ERROR_RESPONSE along with 0xFFFF and 0xFFFFFFFF in the comment
about identifying config read errors. This makes checks for config read
errors easier to find. Comment change only.

Link: https://lore.kernel.org/r/866e2db544df45af70df7e64659bf02e03998ae3.1637243717.git.naveennaidu479@gmail.com
Signed-off-by: Naveen Naidu <naveennaidu479@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Naveen Naidu 2021-11-18 19:33:32 +05:30 committed by Bjorn Helgaas
parent a18a025c2f
commit 289e3ea3a5
1 changed files with 6 additions and 6 deletions
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12
drivers/pci/access.c
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@ -412,9 +412,9 @@ int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val)
if (pcie_capability_reg_implemented(dev, pos)) {
ret = pci_read_config_word(dev, pci_pcie_cap(dev) + pos, val);
/*
* Reset *val to 0 if pci_read_config_word() fails, it may
* have been written as 0xFFFF if hardware error happens
* during pci_read_config_word().
* Reset *val to 0 if pci_read_config_word() fails; it may
* have been written as 0xFFFF (PCI_ERROR_RESPONSE) if the
* config read failed on PCI.
*/
if (ret)
*val = 0;
@ -447,9 +447,9 @@ int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val)
if (pcie_capability_reg_implemented(dev, pos)) {
ret = pci_read_config_dword(dev, pci_pcie_cap(dev) + pos, val);
/*
* Reset *val to 0 if pci_read_config_dword() fails, it may
* have been written as 0xFFFFFFFF if hardware error happens
* during pci_read_config_dword().
* Reset *val to 0 if pci_read_config_dword() fails; it may
* have been written as 0xFFFFFFFF (PCI_ERROR_RESPONSE) if
* the config read failed on PCI.
*/
if (ret)
*val = 0;