From: Sylwester Dziedziuch sylwesterx.dziedziuch@intel.com
[ 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: e4b433f4a741 ("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 --- 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 381b28a08746..bb2a79b70c3a 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -1525,6 +1525,7 @@ 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; @@ -1648,6 +1649,7 @@ 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;