AuxXxilium/linux_dsm_epyc7002
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ice: Clean control queues only when they are initialized

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Clean control queues only when they are initialized. One of the ways to
validate if the basic initialization is done is by checking value of
cq->sq.head and cq->rq.head variables that specify the register address.
This patch adds a check to avoid NULL pointer dereference crash when tried
to shutdown uninitialized control queue.

Signed-off-by: Preethi Banala <preethi.banala@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Tony Brelinski <tonyx.brelinski@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Preethi Banala 2018-08-09 06:28:55 -07:00 committed by Jeff Kirsher
parent f8ba7db850
commit b29bc220e2
1 changed files with 16 additions and 8 deletions
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24
drivers/net/ethernet/intel/ice/ice_controlq.c
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@ -597,10 +597,14 @@ static enum ice_status ice_init_check_adminq(struct ice_hw *hw)
return 0;
init_ctrlq_free_rq:
ice_shutdown_rq(hw, cq);
ice_shutdown_sq(hw, cq);
mutex_destroy(&cq->sq_lock);
mutex_destroy(&cq->rq_lock);
if (cq->rq.head) {
ice_shutdown_rq(hw, cq);
mutex_destroy(&cq->rq_lock);
}
if (cq->sq.head) {
ice_shutdown_sq(hw, cq);
mutex_destroy(&cq->sq_lock);
}
return status;
}
@ -706,10 +710,14 @@ static void ice_shutdown_ctrlq(struct ice_hw *hw, enum ice_ctl_q q_type)
return;
}
ice_shutdown_sq(hw, cq);
ice_shutdown_rq(hw, cq);
mutex_destroy(&cq->sq_lock);
mutex_destroy(&cq->rq_lock);
if (cq->sq.head) {
ice_shutdown_sq(hw, cq);
mutex_destroy(&cq->sq_lock);
}
if (cq->rq.head) {
ice_shutdown_rq(hw, cq);
mutex_destroy(&cq->rq_lock);
}
}
/**