linux-kernel - Re: [PATCH 2.6.30 2/4] cxgb3: fix workqueue flush issues

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Message-Id: <20090420.020819.234015726.davem@davemloft.net>
Date:	Mon, 20 Apr 2009 02:08:19 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	divy@...lsio.com
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	swise@...ngridcomputing.com
Subject: Re: [PATCH 2.6.30 2/4] cxgb3: fix workqueue flush issues

From: Divy Le Ray <divy@...lsio.com>
Date: Fri, 17 Apr 2009 15:21:17 -0700

> The fatal error task can be scheduled while processing an offload packet
> in NAPI context when the connection handle is bogus. this can race
> with the ports being brought down and the cxgb3 workqueue being flushed.
> Stop napi processing before flushing the work queue.
> 
> The ULP drivers (iSCSI, iWARP) might also schedule a task on keventd_wk 
> while releasing a connection handle (cxgb3_offload.c::cxgb3_queue_tid_release()).
> The driver however does not flush any work on keventd_wq while being unloaded. 
> This patch also fixes this.
> 
> Also call cancel_delayed_work_sync in place of the the deprecated
> cancel_rearming_delayed_workqueue.
> 
> Signed-off-by: Divy Le Ray <divy@...lsio.com>

Applied.
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