> ---------- Original message ----------
quoted text
> From: Chris Wright <chrisw@sous-sol.org>
> Date: Mar 21, 2008 11:43 PM
> Subject: [patch 51/76] ioat: fix ack handling, driver must ensure that
> ack is zero
> To: linux-kernel@vger.kernel.org, stable@kernel.org, jejb@kernel.org
> Cc: Justin Forbes <jmforbes@linuxtx.org>, Zwane Mwaikambo
> <zwane@arm.linux.org.uk>, Theodore Ts'o <tytso@mit.edu>, Randy Dunlap
> <rdunlap@xenotime.net>, Dave Jones <davej@redhat.com>, Chuck Wolber
> <chuckw@quantumlinux.com>, Chris Wedgwood <reviews@ml.cw.f00f.org>,
> Michael Krufky <mkrufky@linuxtv.org>, Chuck Ebbert
> <cebbert@redhat.com>, Domenico Andreoli <cavokz@gmail.com>,
> torvalds@linux-foundation.org, akpm@linux-foundation.org,
> alan@lxorguk.ukuu.org.uk, Dan Williams <dan.j.williams@intel.com>,
> Shannon Nelson <shannon.nelson@intel.com>, Greg Kroah-Hartman
> <gregkh@suse.de>
> 
> 
> -stable review patch.  If anyone has any objections, please let us
know.
quoted text
> ---------------------
> 
> From: Dan Williams <dan.j.williams@intel.com>
> 
> Initialize 'ack' to zero in case the descriptor has been recycled.
> 
> Prevents "kernel BUG at crypto/async_tx/async_xor.c:185!"
> 
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
> Acked-by: Shannon Nelson <shannon.nelson@intel.com>
> [chrisw@sous-sol.org: backport to 2.6.24.3]
> Signed-off-by: Chris Wright <chrisw@sous-sol.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
> ---
> 
>  drivers/dma/ioat_dma.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> --- a/drivers/dma/ioat_dma.c
> +++ b/drivers/dma/ioat_dma.c
> @@ -726,6 +726,7 @@ static struct dma_async_tx_descriptor *i
> 
>        if (new) {
>                new->len = len;
> +               new->async_tx.ack = 0;
>                return &new->async_tx;
>        } else
>                return NULL;
> @@ -749,6 +750,7 @@ static struct dma_async_tx_descriptor *i
> 
>        if (new) {
>                new->len = len;
> +               new->async_tx.ack = 0;
>                return &new->async_tx;
>        } else
>                return NULL;
> 
> --

Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
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