[PATCH 5.10 1/1] smbdirect: missing rc checks while waiting for rdma events

[Anastasia Belova]

From: Steve French <stfrench@xxxxxxxxxxxxx>

commit 0555b221528e9cb11f5766dcdee19c809187e42e upstream.

There were two places where we weren't checking for error
(e.g. ERESTARTSYS) while waiting for rdma resolution.

Addresses-Coverity: 1462165 ("Unchecked return value")
Reviewed-by: Tom Talpey <tom@xxxxxxxxxx>
Reviewed-by: Long Li <longli@xxxxxxxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
Signed-off-by: Anastasia Belova <abelova@xxxxxxxxxxxxx>
---
 fs/cifs/smbdirect.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c
index bcc611069308..7d18b9268817 100644
--- a/fs/cifs/smbdirect.c
+++ b/fs/cifs/smbdirect.c
@@ -571,8 +571,13 @@ static struct rdma_cm_id *smbd_create_id(
 		log_rdma_event(ERR, "rdma_resolve_addr() failed %i\n", rc);
 		goto out;
 	}
-	wait_for_completion_interruptible_timeout(
+	rc = wait_for_completion_interruptible_timeout(
 		&info->ri_done, msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT));
+	/* e.g. if interrupted returns -ERESTARTSYS */
+	if (rc < 0) {
+		log_rdma_event(ERR, "rdma_resolve_addr timeout rc: %i\n", rc);
+		goto out;
+	}
 	rc = info->ri_rc;
 	if (rc) {
 		log_rdma_event(ERR, "rdma_resolve_addr() completed %i\n", rc);
@@ -585,8 +590,13 @@ static struct rdma_cm_id *smbd_create_id(
 		log_rdma_event(ERR, "rdma_resolve_route() failed %i\n", rc);
 		goto out;
 	}
-	wait_for_completion_interruptible_timeout(
+	rc = wait_for_completion_interruptible_timeout(
 		&info->ri_done, msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT));
+	/* e.g. if interrupted returns -ERESTARTSYS */
+	if (rc < 0)  {
+		log_rdma_event(ERR, "rdma_resolve_addr timeout rc: %i\n", rc);
+		goto out;
+	}
 	rc = info->ri_rc;
 	if (rc) {
 		log_rdma_event(ERR, "rdma_resolve_route() completed %i\n", rc);
-- 
2.30.2