[PATCH 6.18 1026/1611] cifs: Fix missing credit release on failure in cifs_issue_read()

6.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: David Howells <[email protected]>

[ Upstream commit c16b8c4cfb4fe2244cc33e469a93c1ab8684146b ]

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 <[email protected]>
Acked-by: Paulo Alcantara (Red Hat) <[email protected]>
cc: [email protected]
cc: [email protected]
cc: [email protected]
Signed-off-by: Steve French <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
 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 b0dc071a9de4f2..a34457d5143e1e 100644
--- a/fs/smb/client/file.c
+++ b/fs/smb/client/file.c
@@ -242,6 +242,7 @@ 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);
 }
-- 
2.53.0