Re: [PATCH] cifs: drop spinlock before calling cifs_put_tlink

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On Mon, 11 Jul 2011 10:16:34 -0400
Jeff Layton <jlayton@xxxxxxxxxx> wrote:

> ...as that function can sleep.
> 
> Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
> ---
>  fs/cifs/connect.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
> index ceab134..dd695c5 100644
> --- a/fs/cifs/connect.c
> +++ b/fs/cifs/connect.c
> @@ -2241,8 +2241,8 @@ cifs_match_super(struct super_block *sb, void *data)
>  
>  	rc = compare_mount_options(sb, mnt_data);
>  out:
> -	cifs_put_tlink(tlink);
>  	spin_unlock(&cifs_tcp_ses_lock);
> +	cifs_put_tlink(tlink);
>  	return rc;
>  }
>  

Steve, this should probably be pushed to 3.0 if possible. This can
deadlock if you end up putting the last tcon reference in this call.

-- 
Jeff Layton <jlayton@xxxxxxxxxx>
--
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