fm10k: don't continue probe if PCI device not in normal IO state

In the event of an uncorrectable AER error occurring when the driver has
not loaded, the recovery routines are not done. This is done because
future loads of the driver may not be aware of the IO state and may not
be able to recover at all. In this case, when we next load the driver it
fails due to what appears to be a surprise remove event. Instead, add
a check to ensure that the device is in the normal IO state before
continuing to probe. This allows us to give a more descriptive message
of what is wrong.

Without this change, the driver will attempt to probe up to our first
call of .reset_hw() which will be unable to read registers and act as if
a surprise remove event occurred.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <Krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Orabug: 25394529
(cherry picked from commit 18095937cb1c66b8ff944de02cf04d1497008352)
Signed-off-by: Jack Vogel <jack.vogel@oracle.com>

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
index 3b46eaeed1e9b89a3c12161cd2c5d38cda8236a9..43f77463fdb3cdf95d2375f6bc54b6e3cbbf357f 100644 (file)
--- a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c
@@ -2046,6 +2046,12 @@ static int fm10k_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
        struct fm10k_intfc *interface;
        int err;
 
+       if (pdev->error_state != pci_channel_io_normal) {
+               dev_err(&pdev->dev,
+                       "PCI device still in an error state. Unable to load...\n");
+               return -EIO;
+       }
+
        err = pci_enable_device_mem(pdev);
        if (err) {
                dev_err(&pdev->dev,