[Intel-wired-lan] [PATCH net v1] i40e: Fix check for PF state (vf disable)

[Mateusz Palczewski]

When PF state bit for __I40e_VF_DISABLE is set,
it doesn't mean necessary that the VF called in
i40e_reset_vf is disabled. It is rather impossible to
call a reset on a disabled VF, so return false and
repeat the request after a while.

Fixes: 8d38e0c("i40e: Fix removing driver while bare-metal VFs pass traffic")
Signed-off-by: Mateusz Palczewski <mateusz.palczewski at intel.com>
Signed-off-by: Slawomir Laba <slawomirx.laba at intel.com>
Reviewed-on: https://git-amr-1.devtools.intel.com/gerrit/301695
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov at intel.com>
Tested-by: Aleksandr Loktionov <aleksandr.loktionov at intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 8951740..d30a57f 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1423,6 +1423,8 @@ bool i40e_reset_vf(struct i40e_vf *vf, bool flr)
 
 	/* If the VFs have been disabled, this means something else is
 	 * resetting the VF, so we shouldn't continue.
+	 * This is a global state of a PF, so it is possible that
+	 * a different VF is in reset.
 	 */
 	if (test_and_set_bit(__I40E_VF_DISABLE, pf->state))
 		return false;
-- 
2.17.1

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