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i40e: Fix for VF MAC address 0

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[ 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: e4b433f4a7 ("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>
This commit is contained in:
Sylwester Dziedziuch 2022-10-31 13:00:28 +01:00 committed by Greg Kroah-Hartman
parent a1e295517b
commit 9337d87da4
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
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@ -1394,6 +1394,7 @@ bool i40e_reset_vf(struct i40e_vf *vf, bool flr)
i40e_cleanup_reset_vf(vf); i40e_cleanup_reset_vf(vf);
i40e_flush(hw); i40e_flush(hw);
usleep_range(20000, 40000);
clear_bit(I40E_VF_STATE_RESETTING, &vf->vf_states); clear_bit(I40E_VF_STATE_RESETTING, &vf->vf_states);
return true; return true;
@ -1517,6 +1518,7 @@ bool i40e_reset_all_vfs(struct i40e_pf *pf, bool flr)
} }
i40e_flush(hw); i40e_flush(hw);
usleep_range(20000, 40000);
clear_bit(__I40E_VF_DISABLE, pf->state); clear_bit(__I40E_VF_DISABLE, pf->state);
return true; return true;