qed: Prevent probe on previous error
Don't allow driver to probe on an adapter at a failed state;
Gracefully block the probe instead.
Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/qlogic/qed/qed_main.c b/drivers/net/ethernet/qlogic/qed/qed_main.c
index 08cd92d..e4e6ca5 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_main.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_main.c
@@ -99,12 +99,15 @@
pci_disable_device(pdev);
}
+#define PCI_REVISION_ID_ERROR_VAL 0xff
+
/* Performs PCI initializations as well as initializing PCI-related parameters
* in the device structrue. Returns 0 in case of success.
*/
static int qed_init_pci(struct qed_dev *cdev,
struct pci_dev *pdev)
{
+ u8 rev_id;
int rc;
cdev->pdev = pdev;
@@ -138,6 +141,14 @@
pci_save_state(pdev);
}
+ pci_read_config_byte(pdev, PCI_REVISION_ID, &rev_id);
+ if (rev_id == PCI_REVISION_ID_ERROR_VAL) {
+ DP_NOTICE(cdev,
+ "Detected PCI device error [rev_id 0x%x]. Probably due to prior indication. Aborting.\n",
+ rev_id);
+ rc = -ENODEV;
+ goto err2;
+ }
if (!pci_is_pcie(pdev)) {
DP_NOTICE(cdev, "The bus is not PCI Express\n");
rc = -EIO;