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PCI: Use PCI_ERROR_RESPONSE to identify config read errors
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>
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@ -412,9 +412,9 @@ int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val)
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if (pcie_capability_reg_implemented(dev, pos)) {
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ret = pci_read_config_word(dev, pci_pcie_cap(dev) + pos, val);
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/*
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* Reset *val to 0 if pci_read_config_word() fails, it may
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* have been written as 0xFFFF if hardware error happens
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* during pci_read_config_word().
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* Reset *val to 0 if pci_read_config_word() fails; it may
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* have been written as 0xFFFF (PCI_ERROR_RESPONSE) if the
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* config read failed on PCI.
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*/
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if (ret)
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*val = 0;
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@ -447,9 +447,9 @@ int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val)
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if (pcie_capability_reg_implemented(dev, pos)) {
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ret = pci_read_config_dword(dev, pci_pcie_cap(dev) + pos, val);
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/*
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* Reset *val to 0 if pci_read_config_dword() fails, it may
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* have been written as 0xFFFFFFFF if hardware error happens
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* during pci_read_config_dword().
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* Reset *val to 0 if pci_read_config_dword() fails; it may
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* have been written as 0xFFFFFFFF (PCI_ERROR_RESPONSE) if
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* the config read failed on PCI.
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*/
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if (ret)
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*val = 0;
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