Commit 9337d87d authored Oct 31, 2022 by Sylwester Dziedziuch Committed by Greg Kroah-Hartman Dec 14, 2022

i40e: Fix for VF MAC address 0



[ Upstream commit 08501970472077ed5de346ad89943a37d1692e9b ]

After spawning max VFs on a PF, some VFs were not getting resources and
their MAC addresses were 0. This was caused by PF sleeping before flushing
HW registers which caused VIRTCHNL_VFR_VFACTIVE to not be set in time for
VF.

Fix by adding a sleep after hw flush.

Fixes: e4b433f4 ("i40e: reset all VFs in parallel when rebuilding PF")
Signed-off-by: Sylwester Dziedziuch <sylwesterx.dziedziuch@intel.com>
Signed-off-by: Jan Sokolowski <jan.sokolowski@intel.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent a1e29551

drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1394,6 +1394,7 @@ bool i40e_reset_vf(struct i40e_vf *vf, bool flr)
		i40e_cleanup_reset_vf(vf);

		i40e_flush(hw);
		usleep_range(20000, 40000);
		clear_bit(I40E_VF_STATE_RESETTING, &vf->vf_states);

		return true;
		@@ -1517,6 +1518,7 @@ bool i40e_reset_all_vfs(struct i40e_pf *pf, bool flr)
		}

		i40e_flush(hw);
		usleep_range(20000, 40000);
		clear_bit(__I40E_VF_DISABLE, pf->state);

		return true;