[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Message-ID: <54A99B4A.4030606@amd.com>
Date: Sun, 4 Jan 2015 21:58:02 +0200
From: Oded Gabbay <oded.gabbay@....com>
To: Alexey Khoroshilov <khoroshilov@...ras.ru>
CC: Alex Deucher <alexander.deucher@....com>,
Christian König
<christian.koenig@....com>, <dri-devel@...ts.freedesktop.org>,
<linux-kernel@...r.kernel.org>, <ldv-project@...uxtesting.org>
Subject: Re: [PATCH] drm/radeon: do not left queue acquired if timeout happens
in kgd_hqd_destroy()
On 01/04/2015 01:31 AM, Alexey Khoroshilov wrote:
> If timeout happens, kgd_hqd_destroy() just returns -ETIME leaving queue acquired.
> It may cause a deadlock, so the patch proposes to release queue before return.
>
> Found by Linux Driver Verification project (linuxtesting.org).
>
> Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
> ---
> drivers/gpu/drm/radeon/radeon_kfd.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_kfd.c b/drivers/gpu/drm/radeon/radeon_kfd.c
> index 242fd8b1b221..335e29dbab05 100644
> --- a/drivers/gpu/drm/radeon/radeon_kfd.c
> +++ b/drivers/gpu/drm/radeon/radeon_kfd.c
> @@ -556,6 +556,7 @@ static int kgd_hqd_destroy(struct kgd_dev *kgd, uint32_t reset_type,
> if (timeout == 0) {
> pr_err("kfd: cp queue preemption time out (%dms)\n",
> temp);
> + release_queue(kgd);
> return -ETIME;
> }
> msleep(20);
>
Thanks for catching that!
Applied to my fixes tree.
Oded
--
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/
Powered by blists - more mailing lists