AuxXxilium/linux_dsm_epyc7002
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qed: Prevent probe on previous error

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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>
This commit is contained in:
Yuval Mintz 2016-02-24 16:52:49 +02:00 committed by David S. Miller
parent d43d3f0f39
commit 0dfaba6d0b
1 changed files with 11 additions and 0 deletions
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11
drivers/net/ethernet/qlogic/qed/qed_main.c
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@ -99,12 +99,15 @@ static void qed_free_pci(struct qed_dev *cdev)
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 @@ static int qed_init_pci(struct qed_dev *cdev,
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;