From: Mitch Williams Date: Fri, 4 Jun 2021 16:53:28 +0000 (-0700) Subject: iavf: restore MSI state on reset X-Git-Tag: v5.16-rc5~33^2~21^2~4 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7e4dcc13965c57869684d57a1dc6dd7be589488c;p=thirdparty%2Fkernel%2Flinux.git iavf: restore MSI state on reset 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 Tested-by: George Kuruvinakunnel Signed-off-by: Tony Nguyen --- diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c index 14934a7a13efd..cfdbf8c08d18b 100644 --- a/drivers/net/ethernet/intel/iavf/iavf_main.c +++ b/drivers/net/ethernet/intel/iavf/iavf_main.c @@ -2248,6 +2248,7 @@ static void iavf_reset_task(struct work_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",