cifs: when a channel is not found for server, log its connection id

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>

diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index 0bece97547d4b760138a22299feca6d8ebe6078c..d417de354d9d7c36dd3819e9591018efeeb69898 100644 (file)
--- 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;
 }