From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ilija Hadzic Subject: [PATCH 4/6] drm: fix error recovery path in drm_crtc_helper_set_mode Date: Tue, 29 Oct 2013 11:09:44 -0400 Message-ID: <1383059386-20917-5-git-send-email-ihadzic@research.bell-labs.com> References: <1383059386-20917-1-git-send-email-ihadzic@research.bell-labs.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from ihemail3.lucent.com (ihemail3.lucent.com [135.245.0.37]) by gabe.freedesktop.org (Postfix) with ESMTP id 97C10EE295 for ; Tue, 29 Oct 2013 08:15:11 -0700 (PDT) In-Reply-To: <1383059386-20917-1-git-send-email-ihadzic@research.bell-labs.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org To: airlied@gmail.com, dri-devel@lists.freedesktop.org Cc: Ilija Hadzic List-Id: dri-devel@lists.freedesktop.org There is no need to save or restore hwmode field, because by the time this function sets this field, it cannot fail any more. However, we should save old enabled field because if the function fails, we want to return with unchanged CRTC. Signed-off-by: Ilija Hadzic --- drivers/gpu/drm/drm_crtc_helper.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index 65f3658..9e536b1 100644 --- a/drivers/gpu/drm/drm_crtc_helper.c +++ b/drivers/gpu/drm/drm_crtc_helper.c @@ -405,22 +405,25 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, struct drm_framebuffer *old_fb) { struct drm_device *dev = crtc->dev; - struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode; + struct drm_display_mode *adjusted_mode, saved_mode; struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; struct drm_encoder_helper_funcs *encoder_funcs; int saved_x, saved_y; + bool saved_enabled; struct drm_encoder *encoder; bool ret = true; + saved_enabled = crtc->enabled; crtc->enabled = drm_helper_crtc_in_use(crtc); if (!crtc->enabled) return true; adjusted_mode = drm_mode_duplicate(dev, mode); - if (!adjusted_mode) + if (!adjusted_mode) { + crtc->enabled = saved_enabled; return false; + } - saved_hwmode = crtc->hwmode; saved_mode = crtc->mode; saved_x = crtc->x; saved_y = crtc->y; @@ -539,7 +542,7 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, done: drm_mode_destroy(dev, adjusted_mode); if (!ret) { - crtc->hwmode = saved_hwmode; + crtc->enabled = saved_enabled; crtc->mode = saved_mode; crtc->x = saved_x; crtc->y = saved_y; -- 1.8.2.1