From: Shyam Prasad N <sprasad@microsoft.com>
Date: Tue, 14 Jun 2022 11:47:24 +0000
Subject: [PATCH] cifs: when a channel is not found for server, log its
 connection id
Git-commit: 5d24968f5b7e00bae564b1646c3b9e0e3750aabe
References: bsc#1193629
Patch-mainline: v5.19-rc3

cifs_ses_get_chan_index gets the index for a given server pointer.
When a match is not found, we warn about a possible bug.
However, printing details about the non-matching server could be
more useful to debug here.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Paulo Alcantara <palcantara@suse.de>
---
 fs/cifs/sess.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index 0bece97547d4..d417de354d9d 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -81,6 +81,9 @@ cifs_ses_get_chan_index(struct cifs_ses *ses,
 	}
 
 	/* If we didn't find the channel, it is likely a bug */
+	if (server)
+		cifs_dbg(VFS, "unable to get chan index for server: 0x%llx",
+			 server->conn_id);
 	WARN_ON(1);
 	return 0;
 }
-- 
2.37.3