From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753563AbbDANQS (ORCPT ); Wed, 1 Apr 2015 09:16:18 -0400 Received: from mx1.redhat.com ([209.132.183.28]:58264 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753148AbbDANQA (ORCPT ); Wed, 1 Apr 2015 09:16:00 -0400 From: Gerd Hoffmann To: dri-devel@lists.freedesktop.org, virtio-dev@lists.oasis-open.org Cc: airlied@gmail.com, airlied@redhat.com, mst@redhat.com, Gerd Hoffmann , David Airlie , linux-kernel@vger.kernel.org (open list) Subject: [PATCH v2 2/4] drm_vblank_get: don't WARN_ON in case vblanks are not initialized Date: Wed, 1 Apr 2015 15:15:28 +0200 Message-Id: <1427894130-14228-3-git-send-email-kraxel@redhat.com> In-Reply-To: <1427894130-14228-1-git-send-email-kraxel@redhat.com> References: <1427894130-14228-1-git-send-email-kraxel@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Gerd Hoffmann --- drivers/gpu/drm/drm_irq.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c index 10574a0..c631c1a 100644 --- a/drivers/gpu/drm/drm_irq.c +++ b/drivers/gpu/drm/drm_irq.c @@ -1026,6 +1026,9 @@ int drm_vblank_get(struct drm_device *dev, int crtc) unsigned long irqflags; int ret = 0; + if (!dev->num_crtcs) + return -EINVAL; + if (WARN_ON(crtc >= dev->num_crtcs)) return -EINVAL; -- 1.8.3.1