[PATCH v2] librdmacm: Make some functions report proper errno

[Xiao Yang <yangx.jy@cn.fujitsu.com>]

Some functions reports fixed ENOMEM when getting any failure, so
it's hard for user to know which actual error happens on them.

Fixes(ucma_get_device):
2ffda7f29913 ("librdmacm: Only allocate verbs resources when needed")
191c9346f335 ("librdmacm: Reference count access to verbs context")
Fixes(ucma_create_cqs):
f8f1335ad8d8 ("librdmacm: make CQs optional for rdma_create_qp")
9e33488e8e50 ("librdmacm: fix all calls to set errno")
Fixes(rdma_create_qp_ex):
d2efdede11f7 ("r4019: Add support for userspace RDMA connection management abstraction (CMA)")
4e33a4109a62 ("librdmacm: returns errors from the library consistently")
995eb0c90c1a ("rdmacm: Add support for XRC QPs")

Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
---
 librdmacm/cma.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/librdmacm/cma.c b/librdmacm/cma.c
index 8c820ccf..a2575156 100644
--- a/librdmacm/cma.c
+++ b/librdmacm/cma.c
@@ -635,7 +635,7 @@ static int ucma_get_device(struct cma_id_private *id_priv, __be64 guid,
 	if (!cma_dev->pd)
 		cma_dev->pd = ibv_alloc_pd(cma_dev->verbs);
 	if (!cma_dev->pd) {
-		ret = ERR(ENOMEM);
+		ret = -1;
 		goto out;
 	}
 
@@ -1490,7 +1490,7 @@ static int ucma_create_cqs(struct rdma_cm_id *id, uint32_t send_size, uint32_t r
 	return 0;
 err:
 	ucma_destroy_cqs(id);
-	return ERR(ENOMEM);
+	return -1;
 }
 
 int rdma_create_srq_ex(struct rdma_cm_id *id, struct ibv_srq_init_attr_ex *attr)
@@ -1662,7 +1662,7 @@ int rdma_create_qp_ex(struct rdma_cm_id *id,
 		attr->srq = id->srq;
 	qp = ibv_create_qp_ex(id->verbs, attr);
 	if (!qp) {
-		ret = ERR(ENOMEM);
+		ret = -1;
 		goto err1;
 	}
 
-- 
2.25.1