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Message-ID: <AANLkTikZN8rPcusHrOR3eCyQWXmzd=fMc4riRvKpzQ_O@mail.gmail.com> Date: Mon, 20 Dec 2010 19:11:01 +0200 From: Felipe Contreras <felipe.contreras@...il.com> To: Felipe Contreras <felipe.contreras@...ia.com> Cc: linux-main <linux-kernel@...r.kernel.org>, linux-omap <linux-omap@...r.kernel.org>, Greg KH <greg@...ah.com>, Omar Ramirez Luna <omar.ramirez@...com>, Ohad Ben-Cohen <ohad@...ery.com>, Fernando Guzman Lugo <fernando.lugo@...com>, Nishanth Menon <nm@...com>, Ameya Palande <ameya.palande@...ia.com> Subject: Re: [PATCH 0/2] staging: tidspbridge: fix dma race condition On Mon, Dec 20, 2010 at 4:25 PM, Felipe Contreras <felipe.contreras@...ia.com> wrote: > I found a race condition that triggers a kernel panic. It's explained in the > following patches, but basically the map_obj that contains the user pages is > being destroyed while doing a DMA operation (which requires that map_obj). > > My solution is to convert the spinlock to a semaphore, and exten the area > protected (which might sleep). > > I have not tested these specific patches; they have been forward ported. But in > a similar branch, they solve the issue. Please disregard this patch series, I'll send a simpler single patch that does the trick. -- Felipe Contreras -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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