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 RESPONSE_IS_PCI_ERROR() to check the response we get when we read
data from hardware.
This helps unify PCI error response checking and make error checks
consistent and easier to find.
Signed-off-by: Naveen Naidu <naveennaidu479@xxxxxxxxx>
---
drivers/pci/hotplug/cpqphp_ctrl.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/hotplug/cpqphp_ctrl.c b/drivers/pci/hotplug/cpqphp_ctrl.c
index 1b26ca0b3701..d5274b9b06a5 100644
--- a/drivers/pci/hotplug/cpqphp_ctrl.c
+++ b/drivers/pci/hotplug/cpqphp_ctrl.c
@@ -2273,7 +2273,7 @@ static u32 configure_new_device(struct controller *ctrl, struct pci_func *func
while ((function < max_functions) && (!stop_it)) {
pci_bus_read_config_dword(ctrl->pci_bus, PCI_DEVFN(func->device, function), 0x00, &ID);
- if (ID == 0xFFFFFFFF) {
+ if (RESPONSE_IS_PCI_ERROR(&ID)) {
function++;
} else {
/* Setup slot structure. */
@@ -2517,7 +2517,7 @@ static int configure_new_function(struct controller *ctrl, struct pci_func *func
pci_bus_read_config_dword(pci_bus, PCI_DEVFN(device, 0), 0x00, &ID);
pci_bus->number = func->bus;
- if (ID != 0xFFFFFFFF) { /* device present */
+ if (!RESPONSE_IS_PCI_ERROR(&ID)) { /* device present */
/* Setup slot structure. */
new_slot = cpqhp_slot_create(hold_bus_node->base);
--
2.25.1
