From 8456b99c16d193c4c3b7df305cf431e027f0189c Mon Sep 17 00:00:00 2001 From: Mikulas Patocka Date: Sun, 3 Jun 2018 16:40:55 +0200 Subject: [PATCH] udl-kms: change down_interruptible to down If we leave urbs around, it causes not only leak, but also memory corruption. This patch fixes the function udl_free_urb_list, so that it always waits for all urbs that are in progress. Signed-off-by: Mikulas Patocka Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie --- drivers/gpu/drm/udl/udl_main.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/drivers/gpu/drm/udl/udl_main.c b/drivers/gpu/drm/udl/udl_main.c index d518de8f496b..1239decd46ff 100644 --- a/drivers/gpu/drm/udl/udl_main.c +++ b/drivers/gpu/drm/udl/udl_main.c @@ -170,18 +170,13 @@ static void udl_free_urb_list(struct drm_device *dev) struct list_head *node; struct urb_node *unode; struct urb *urb; - int ret; unsigned long flags; DRM_DEBUG("Waiting for completes and freeing all render urbs\n"); /* keep waiting and freeing, until we've got 'em all */ while (count--) { - - /* Getting interrupted means a leak, but ok at shutdown*/ - ret = down_interruptible(&udl->urbs.limit_sem); - if (ret) - break; + down(&udl->urbs.limit_sem); spin_lock_irqsave(&udl->urbs.lock, flags); -- 2.30.2