linux-kernel - RE: [patch 51/76] ioat: fix ack handling, driver must ensure that ack is zero

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Date:	Tue, 25 Mar 2008 15:55:23 -0000
From:	"Sosnowski, Maciej" <maciej.sosnowski@...el.com>
To:	<linux-kernel@...r.kernel.org>, <stable@...nel.org>,
	<jejb@...nel.org>
Cc:	<jmforbes@...uxtx.org>, <zwane@....linux.org.uk>, <tytso@....edu>,
	<rdunlap@...otime.net>, <davej@...hat.com>,
	<chuckw@...ntumlinux.com>, <reviews@...cw.f00f.org>,
	<mkrufky@...uxtv.org>, <cebbert@...hat.com>, <cavokz@...il.com>,
	<torvalds@...ux-foundation.org>, <akpm@...ux-foundation.org>,
	<alan@...rguk.ukuu.org.uk>,
	"Williams, Dan J" <dan.j.williams@...el.com>,
	"Nelson, Shannon" <shannon.nelson@...el.com>, <gregkh@...e.de>
Subject: RE: [patch 51/76] ioat: fix ack handling, driver must ensure that ack is zero

> ---------- Original message ----------
> From: Chris Wright <chrisw@...s-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@...r.kernel.org, stable@...nel.org, jejb@...nel.org
> Cc: Justin Forbes <jmforbes@...uxtx.org>, Zwane Mwaikambo
> <zwane@....linux.org.uk>, Theodore Ts'o <tytso@....edu>, Randy Dunlap
> <rdunlap@...otime.net>, Dave Jones <davej@...hat.com>, Chuck Wolber
> <chuckw@...ntumlinux.com>, Chris Wedgwood <reviews@...cw.f00f.org>,
> Michael Krufky <mkrufky@...uxtv.org>, Chuck Ebbert
> <cebbert@...hat.com>, Domenico Andreoli <cavokz@...il.com>,
> torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
> alan@...rguk.ukuu.org.uk, Dan Williams <dan.j.williams@...el.com>,
> Shannon Nelson <shannon.nelson@...el.com>, Greg Kroah-Hartman
> <gregkh@...e.de>
> 
> 
> -stable review patch.  If anyone has any objections, please let us
know.
> ---------------------
> 
> From: Dan Williams <dan.j.williams@...el.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@...el.com>
> Acked-by: Shannon Nelson <shannon.nelson@...el.com>
> [chrisw@...s-sol.org: backport to 2.6.24.3]
> Signed-off-by: Chris Wright <chrisw@...s-sol.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.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@...el.com>
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