Re: [PATCH 3/3] ib_srpt: Convert to use generic active I/O shutdown logic

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On Thu, Nov 3, 2011 at 8:52 PM, Nicholas A. Bellinger
<nab@xxxxxxxxxxxxxxx> wrote:
> @@ -2365,8 +2384,14 @@ static void srpt_release_channel_work(struct work_struct *w)
>        sdev = ch->sport->sdev;
>        BUG_ON(!sdev);
>
> -       transport_deregister_session_configfs(ch->sess);
> -       transport_deregister_session(ch->sess);
> +       se_sess = ch->sess;
> +       BUG_ON(!se_sess);
> +
> +       target_splice_sess_cmd_list(se_sess);
> +       target_wait_for_sess_cmds(se_sess, 0);
> +
> +       transport_deregister_session_configfs(se_sess);
> +       transport_deregister_session(se_sess);
>        ch->sess = NULL;
>
>        srpt_destroy_ch_ib(ch);

This leaves the possibility open that ch->sess is used by
srpt_handle_new_iu() while  transport_deregister_session() is in
progress. That's a race condition.

Bart.
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