bnxt_en: Fix PCI AER error recovery flow

When a PCI error is detected the PCI state could be corrupt, save
the PCI state after initialization and restore it after the slot
reset.

Fixes: 6316ea6db93d ("bnxt_en: Enable AER support.")
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 31fb5a2..4389a74 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -12339,6 +12339,7 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
                    (long)pci_resource_start(pdev, 0), dev->dev_addr);
        pcie_print_link_status(pdev);
 
+       pci_save_state(pdev);
        return 0;
 
 init_err_cleanup:
@@ -12536,6 +12537,8 @@ static pci_ers_result_t bnxt_io_slot_reset(struct pci_dev *pdev)
                        "Cannot re-enable PCI device after reset.\n");
        } else {
                pci_set_master(pdev);
+               pci_restore_state(pdev);
+               pci_save_state(pdev);
 
                err = bnxt_hwrm_func_reset(bp);
                if (!err) {