pci: intel: Fix error when enumerating multi-function PCIe device
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>
diff --git a/drivers/pci/pcie_intel_fpga.c b/drivers/pci/pcie_intel_fpga.c
index e74b35a..a096d1c 100644
--- a/drivers/pci/pcie_intel_fpga.c
+++ b/drivers/pci/pcie_intel_fpga.c
@@ -161,8 +161,10 @@
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) &&