From: Alexey Khoroshilov Date: Sat, 3 Jan 2015 23:31:20 +0000 (+0300) Subject: drm/radeon: do not leave queue acquired if timeout happens in kgd_hqd_destroy() X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4c18442e536ec24cc5ca23c5bbaa80bd53020b95;p=platform%2Fkernel%2Flinux-exynos.git drm/radeon: do not leave queue acquired if timeout happens in kgd_hqd_destroy() 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 Signed-off-by: Oded Gabbay --- diff --git a/drivers/gpu/drm/radeon/radeon_kfd.c b/drivers/gpu/drm/radeon/radeon_kfd.c index 12c43df..a55afba 100644 --- a/drivers/gpu/drm/radeon/radeon_kfd.c +++ b/drivers/gpu/drm/radeon/radeon_kfd.c @@ -568,6 +568,7 @@ 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);