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nvmf/vfio-user: don't use uninitialized refcount for admin CQ

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Signed-off-by: Thanos Makatos <thanos.makatos@nutanix.com>
Change-Id: I16d511ac10b8ba4dfb2f7a7e5c144e2f2fe1bad5
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15386
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: John Levon <levon@movementarian.org>
This commit is contained in:
Thanos Makatos 2022-11-09 10:08:40 +00:00 committed by Tomasz Zawadzki
parent 25440c3bdb
commit e398dcdadb
1 changed files with 8 additions and 5 deletions
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13
lib/nvmf/vfio_user.c
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@ -329,7 +329,7 @@ struct nvmf_vfio_user_sq {
struct nvmf_vfio_user_cq {
struct spdk_nvmf_transport_poll_group *group;
struct spdk_thread *thread;
uint32_t cq_ref;
int cq_ref;
uint32_t qid;
/* Number of entries in queue. */
@ -1763,10 +1763,8 @@ delete_sq_done(struct nvmf_vfio_user_ctrlr *vu_ctrlr, struct nvmf_vfio_user_sq *
SPDK_DEBUGLOG(nvmf_vfio, "%s: try to delete cqid:%u=%p\n", ctrlr_id(vu_ctrlr),
cq->qid, cq);
if (cq->cq_ref) {
cq->cq_ref--;
}
if (cq->cq_ref == 0) {
assert(cq->cq_ref > 0);
if (--cq->cq_ref == 0) {
unmap_q(vu_ctrlr, &cq->mapping);
cq->size = 0;
cq->cq_state = VFIO_USER_CQ_DELETED;
@ -4978,6 +4976,11 @@ handle_queue_connect_rsp(struct nvmf_vfio_user_req *req, void *cb_arg)
pthread_mutex_lock(&endpoint->lock);
if (nvmf_qpair_is_admin_queue(&sq->qpair)) {
admin_cq->thread = spdk_get_thread();
/*
* The admin queue is special as SQ0 and CQ0 are created
* together.
*/
admin_cq->cq_ref = 1;
start_ctrlr(vu_ctrlr, sq->qpair.ctrlr);
} else {
/* For I/O queues this command was generated in response to an