From bf9b9813ad6c4727f733828a100267601cef52d2 Mon Sep 17 00:00:00 2001 From: Ley Foon Tan Date: Fri, 24 May 2019 10:29:59 +0800 Subject: [PATCH] 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 --- drivers/pci/pcie_intel_fpga.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/pci/pcie_intel_fpga.c b/drivers/pci/pcie_intel_fpga.c index e74b35ac16..a096d1c697 100644 --- a/drivers/pci/pcie_intel_fpga.c +++ b/drivers/pci/pcie_intel_fpga.c @@ -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) && -- 2.25.1