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In-Reply-To: <1292865120-24020-1-git-send-email-felipe.contreras@nokia.com>
References: <1292865120-24020-1-git-send-email-felipe.contreras@nokia.com>
Date: Mon, 7 Mar 2011 20:02:44 +0200
Message-ID: <AANLkTi=w=5L8tbjGDCgoRpjRXYrNxsfWaE2SL4XG9+pY@mail.gmail.com>
Subject: Re: [PATCH] staging: tidspbridge: protect dmm_map properly
From: Felipe Contreras <felipe.contreras@gmail.com>
To: Felipe Contreras <felipe.contreras@nokia.com>
Cc: linux-main <linux-kernel@vger.kernel.org>,
        linux-omap <linux-omap@vger.kernel.org>, Greg KH <greg@kroah.com>,
        Omar Ramirez Luna <omar.ramirez@ti.com>,
        Ohad Ben-Cohen <ohad@wizery.com>,
        Fernando Guzman Lugo <fernando.lugo@ti.com>,
        Nishanth Menon <nm@ti.com>, Ameya Palande <ameya.palande@nokia.com>
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On Mon, Dec 20, 2010 at 7:12 PM, Felipe Contreras
<felipe.contreras@nokia.com> wrote:
> We need to protect not only the dmm_map list, but the individual
> map_obj's, otherwise, we might be building the scatter-gather list with
> garbage. So, use the existing proc_lock for that.
>
> I observed race conditions which caused kernel panics while running
> stress tests. This patch fixes those.

I just heard that Tuomas Kulve is getting a lot of panics on Gumstix
Overo. I propose we apply this patch on the stable tree ASAP, and if
there's no better proposals, also on .38.

-- 
Felipe Contreras
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