[PATCH] cifs: Fix missing credit release on failure in cifs_issue_read()

[David Howells <dhowells@redhat.com>]

Fix missing release of credits in the failure path in cifs_issue_read()
lest retrying the subreq just overwrites the credits value.

Fixes: 69c3c023af25 ("cifs: Implement netfslib hooks")
Link: https://sashiko.dev/#/patchset/20260608145432.681865-1-dhowells%40redhat.com
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Steve French <sfrench@samba.org>
cc: Paulo Alcantara <pc@manguebit.org>
cc: linux-cifs@vger.kernel.org
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
---
 fs/smb/client/file.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/smb/client/file.c b/fs/smb/client/file.c
index 8b25d6c9ec5e..5a25635bc62a 100644
--- a/fs/smb/client/file.c
+++ b/fs/smb/client/file.c
@@ -241,6 +241,7 @@ static void cifs_issue_read(struct netfs_io_subrequest *subreq)
 	return;
 
 failed:
+	add_credits_and_wake_if(rdata->server, &rdata->credits, 0);
 	subreq->error = rc;
 	netfs_read_subreq_terminated(subreq);
 }