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| author | Mitch Williams <mitch.a.williams@intel.com> | 2021-06-04 09:53:28 -0700 |
|---|---|---|
| committer | Tony Nguyen <anthony.l.nguyen@intel.com> | 2021-12-01 13:46:14 -0800 |
| commit | 7e4dcc13965c57869684d57a1dc6dd7be589488c (patch) | |
| tree | f13fa8bfc06fd72095700ad9bf91e0818a65f9d1 /drivers/net/ethernet/intel | |
| parent | 3968e3cafafb72ecf12d1263f935d20bc9df9bc2 (diff) | |
| download | linux-stable-7e4dcc13965c57869684d57a1dc6dd7be589488c.tar.gz linux-stable-7e4dcc13965c57869684d57a1dc6dd7be589488c.tar.bz2 linux-stable-7e4dcc13965c57869684d57a1dc6dd7be589488c.zip | |
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 <mitch.a.williams@intel.com>
Tested-by: George Kuruvinakunnel <george.kuruvinakunnel@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel')
| -rw-r--r-- | drivers/net/ethernet/intel/iavf/iavf_main.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c index 14934a7a13ef..cfdbf8c08d18 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", |