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pci: intel: Fix error when enumerating multi-function PCIe device

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Hardware return completion status non-zero when read from non exist
function in multi-function PCIe device. Return error will cause PCIe
enumeration fail.

Change it to return 0 and return value 0xffffffff when error.

Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
This commit is contained in:
Ley Foon Tan 2019-05-24 10:29:59 +08:00 committed by Tom Rini
parent d0e52c6f29
commit bf9b9813ad
1 changed files with 4 additions and 2 deletions
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6
drivers/pci/pcie_intel_fpga.c
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@ -161,8 +161,10 @@ static int tlp_read_packet(struct intel_fpga_pcie *pcie, u32 *value)
dw[count++] = cra_readl(pcie, RP_RXCPL_REG);
if (ctrl & RP_RXCPL_EOP) {
comp_status = TLP_COMP_STATUS(dw[1]);
if (comp_status)
return -EFAULT;
if (comp_status) {
*value = pci_get_ff(PCI_SIZE_32);
return 0;
}
if (value &&
TLP_BYTE_COUNT(dw[1]) == sizeof(u32) &&