CIFS: Make wait_for_free_request killable
to let us kill the proccess if it hangs waiting for a credit when
the session is down and echo is disabled.
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index e5202dd..58b31da 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -257,6 +257,8 @@
static int
wait_for_free_request(struct TCP_Server_Info *server, const int long_op)
{
+ int rc;
+
spin_lock(&server->req_lock);
if (long_op == CIFS_ASYNC_OP) {
@@ -271,8 +273,11 @@
if (server->credits <= 0) {
spin_unlock(&server->req_lock);
cifs_num_waiters_inc(server);
- wait_event(server->request_q, has_credits(server));
+ rc = wait_event_killable(server->request_q,
+ has_credits(server));
cifs_num_waiters_dec(server);
+ if (rc)
+ return rc;
spin_lock(&server->req_lock);
} else {
if (server->tcpStatus == CifsExiting) {