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ice: Stop processing VF messages during teardown

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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: ddf30f7ff8 ("ice: Add handler to configure SR-IOV")
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Anirudh Venkataramanan 2021-08-04 12:12:42 -07:00 committed by Tony Nguyen
parent 50ac747984
commit c503e63200
2 changed files with 8 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/net/ethernet/intel/ice/ice.h
View file

@ -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,

7
drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c
View file

@ -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;