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cifs: remove unnecessary locking of chan_lock while freeing session

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In cifs_put_smb_ses, when we're freeing the last ref count to
the session, we need to free up each channel. At this point,
it is unnecessary to take chan_lock, since we have the last
reference to the ses.

Picking up this lock also introduced a deadlock because it calls
cifs_put_tcp_ses, which locks cifs_tcp_ses_lock.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Acked-by: Enzo Matsumiya <ematsumiya@suse.de>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Shyam Prasad N 2022-07-06 14:29:12 +00:00 • committed by Steve French
parent 50bd7d5a64
commit 2883f4b5a0
1 changed files with 0 additions and 2 deletions
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2
fs/cifs/connect.c
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@ -1918,7 +1918,6 @@ void cifs_put_smb_ses(struct cifs_ses *ses)
list_del_init(&ses->smb_ses_list);
spin_unlock(&cifs_tcp_ses_lock);
spin_lock(&ses->chan_lock);
chan_count = ses->chan_count;
/* close any extra channels */
@ -1934,7 +1933,6 @@ void cifs_put_smb_ses(struct cifs_ses *ses)
ses->chans[i].server = NULL;
}
}
spin_unlock(&ses->chan_lock);
sesInfoFree(ses);
cifs_put_tcp_session(server, 0);