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PCI: keystone: Use PCI_ERROR_RESPONSE to identify config read errors

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Include PCI_ERROR_RESPONSE along with 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/6ae6b071d92052dc511407513e2a7c0035aff9e7.1637243717.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 19:33:33 +05:30 committed by Bjorn Helgaas
parent 289e3ea3a5
commit 3cfdef7a57
1 changed files with 3 additions and 3 deletions
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6
drivers/pci/controller/dwc/pci-keystone.c
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@ -747,9 +747,9 @@ static int ks_pcie_config_legacy_irq(struct keystone_pcie *ks_pcie)
#ifdef CONFIG_ARM
/*
* When a PCI device does not exist during config cycles, keystone host gets a
* bus error instead of returning 0xffffffff. This handler always returns 0
* for this kind of faults.
* When a PCI device does not exist during config cycles, keystone host
* gets a bus error instead of returning 0xffffffff (PCI_ERROR_RESPONSE).
* This handler always returns 0 for this kind of fault.
*/
static int ks_pcie_fault(unsigned long addr, unsigned int fsr,
struct pt_regs *regs)