From: Mitch Williams mitch.a.williams@intel.com
commit 7e4dcc13965c57869684d57a1dc6dd7be589488c upstream.
If the PF experiences an FLR, the VF's MSI and MSI-X configuration will be conveniently and silently removed in the process. When this happens, reset recovery will appear to complete normally but no traffic will pass. The netdev watchdog will helpfully notify everyone of this issue.
To prevent such public embarrassment, restore MSI configuration at every reset. For normal resets, this will do no harm, but for VF resets resulting from a PF FLR, this will keep the VF working.
Fixes: 5eae00c57f5e ("i40evf: main driver core") Signed-off-by: Mitch Williams mitch.a.williams@intel.com Tested-by: George Kuruvinakunnel george.kuruvinakunnel@intel.com Signed-off-by: Tony Nguyen anthony.l.nguyen@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/intel/iavf/iavf_main.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/net/ethernet/intel/iavf/iavf_main.c +++ b/drivers/net/ethernet/intel/iavf/iavf_main.c @@ -2199,6 +2199,7 @@ static void iavf_reset_task(struct work_ }
pci_set_master(adapter->pdev); + pci_restore_msi_state(adapter->pdev);
if (i == IAVF_RESET_WAIT_COMPLETE_COUNT) { dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",