linux-kernel - Re: [resend PATCH] DMA: PL330: fix locking in pl330_free_chan

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Date:	Wed, 26 Jun 2013 12:05:58 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:	Vinod Koul <vinod.koul@...ux.intel.com>,
	Jassi Brar <jassisinghbrar@...il.com>,
	Tomasz Figa <t.figa@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [resend PATCH] DMA: PL330: fix locking in
 pl330_free_chan_resources()

On Wed, 26 Jun 2013 15:29:15 +0200 Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com> wrote:

> 
> tasklet_kill() may sleep so call it before taking pch->lock.
> 
> Fixes following lockup:
> 
> [  345.470000] BUG: scheduling while atomic: cat/2383/0x00000002

Seems rather unpleasant, so I added a cc:stable to the changelog.
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