[PATCH AUTOSEL 5.17 19/20] cifs: when a channel is not found for server, log its connection id

Sasha Levin
2022-06-21T21:01:22Z

From: Shyam Prasad N <sprasad@microsoft.com>

[ Upstream commit 5d24968f5b7e00bae564b1646c3b9e0e3750aabe ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/cifs/sess.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index 822da5689166..cdc3781a6c3b 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;
}
--
2.35.1