From: Anirudh Venkataramanan Date: Wed, 4 Aug 2021 19:12:42 +0000 (-0700) Subject: ice: Stop processing VF messages during teardown X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c503e63200c679e362afca7aca9d3dc63a0f45ed;p=linux.git ice: Stop processing VF messages during teardown When VFs are setup and torn down in quick succession, it is possible that a VF is torn down by the PF while the VF's virtchnl requests are still in the PF's mailbox ring. Processing the VF's virtchnl request when the VF itself doesn't exist results in undefined behavior. Fix this by adding a check to stop processing virtchnl requests when VF teardown is in progress. Fixes: ddf30f7ff840 ("ice: Add handler to configure SR-IOV") Signed-off-by: Anirudh Venkataramanan Tested-by: Konrad Jankowski Signed-off-by: Tony Nguyen --- diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h index a450343fbb92d..eadcb99583464 100644 --- a/drivers/net/ethernet/intel/ice/ice.h +++ b/drivers/net/ethernet/intel/ice/ice.h @@ -234,6 +234,7 @@ enum ice_pf_state { ICE_VFLR_EVENT_PENDING, ICE_FLTR_OVERFLOW_PROMISC, ICE_VF_DIS, + ICE_VF_DEINIT_IN_PROGRESS, ICE_CFG_BUSY, ICE_SERVICE_SCHED, ICE_SERVICE_DIS, diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c index 2826570dab51b..e93430ab37f1e 100644 --- a/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c @@ -615,6 +615,8 @@ void ice_free_vfs(struct ice_pf *pf) struct ice_hw *hw = &pf->hw; unsigned int tmp, i; + set_bit(ICE_VF_DEINIT_IN_PROGRESS, pf->state); + if (!pf->vf) return; @@ -680,6 +682,7 @@ void ice_free_vfs(struct ice_pf *pf) i); clear_bit(ICE_VF_DIS, pf->state); + clear_bit(ICE_VF_DEINIT_IN_PROGRESS, pf->state); clear_bit(ICE_FLAG_SRIOV_ENA, pf->flags); } @@ -4415,6 +4418,10 @@ void ice_vc_process_vf_msg(struct ice_pf *pf, struct ice_rq_event_info *event) struct device *dev; int err = 0; + /* if de-init is underway, don't process messages from VF */ + if (test_bit(ICE_VF_DEINIT_IN_PROGRESS, pf->state)) + return; + dev = ice_pf_to_dev(pf); if (ice_validate_vf_id(pf, vf_id)) { err = -EINVAL;