RDMA/core: Fix ib_qp_usecnt_dec() called when error

ib_destroy_qp() would called by ib_create_qp_user() if error, the former
contains ib_qp_usecnt_dec(), but ib_qp_usecnt_inc() was not called before.

So move ib_qp_usecnt_inc() into create_qp().

Fixes: d2b10794fc13 ("RDMA/core: Create clean QP creations interface for uverbs")
Link: https://lore.kernel.org/r/20220303024232.2847388-1-yajun.deng@linux.dev
Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 6b63931..4437f83 100644 (file)
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -1437,7 +1437,6 @@ static int create_qp(struct uverbs_attr_bundle *attrs,
                ret = PTR_ERR(qp);
                goto err_put;
        }
-       ib_qp_usecnt_inc(qp);
 
        obj->uevent.uobject.object = qp;
        obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);

diff --git a/drivers/infiniband/core/uverbs_std_types_qp.c b/drivers/infiniband/core/uverbs_std_types_qp.c
index dd10754..75353e0 100644 (file)
--- a/drivers/infiniband/core/uverbs_std_types_qp.c
+++ b/drivers/infiniband/core/uverbs_std_types_qp.c
@@ -254,7 +254,6 @@ static int UVERBS_HANDLER(UVERBS_METHOD_QP_CREATE)(
                ret = PTR_ERR(qp);
                goto err_put;
        }
-       ib_qp_usecnt_inc(qp);
 
        if (attr.qp_type == IB_QPT_XRC_TGT) {
                obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index a9819c4..bc9a83f 100644 (file)
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -1245,6 +1245,7 @@ static struct ib_qp *create_qp(struct ib_device *dev, struct ib_pd *pd,
        if (ret)
                goto err_security;
 
+       ib_qp_usecnt_inc(qp);
        rdma_restrack_add(&qp->res);
        return qp;
 
@@ -1345,8 +1346,6 @@ struct ib_qp *ib_create_qp_kernel(struct ib_pd *pd,
        if (IS_ERR(qp))
                return qp;
 
-       ib_qp_usecnt_inc(qp);
-
        if (qp_init_attr->cap.max_rdma_ctxs) {
                ret = rdma_rw_init_mrs(qp, qp_init_attr);
                if (ret)