An MMIO read from a PCI device that doesn't exist or doesn't respond
causes a PCI error. There's no real data to return to satisfy the
CPU read, so most hardware fabricates ~0 data.
Use SET_PCI_ERROR_RESPONSE() to set the error response, when a faulty
read occurs.
This helps unify PCI error response checking and make error check
consistent and easier to find.
Compile tested only.
Signed-off-by: Naveen Naidu <naveennaidu479@xxxxxxxxx>
---
drivers/pci/controller/pcie-rcar-host.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/controller/pcie-rcar-host.c b/drivers/pci/controller/pcie-rcar-host.c
index 8f3131844e77..80dbc6f717d6 100644
--- a/drivers/pci/controller/pcie-rcar-host.c
+++ b/drivers/pci/controller/pcie-rcar-host.c
@@ -162,7 +162,7 @@ static int rcar_pcie_read_conf(struct pci_bus *bus, unsigned int devfn,
ret = rcar_pcie_config_access(host, RCAR_PCI_ACCESS_READ,
bus, devfn, where, val);
if (ret != PCIBIOS_SUCCESSFUL) {
- *val = 0xffffffff;
+ SET_PCI_ERROR_RESPONSE(val);
return ret;
}
--
2.25.1
