From 1baee58638fc58248625255f5c5fcdb987f11b1f Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Fri, 12 Apr 2013 13:25:20 +1000 Subject: udl: handle EDID failure properly. Don't oops seems proper. Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie --- drivers/gpu/drm/udl/udl_connector.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/udl/udl_connector.c b/drivers/gpu/drm/udl/udl_connector.c index fe5cdbcf2636..b44d548c56f8 100644 --- a/drivers/gpu/drm/udl/udl_connector.c +++ b/drivers/gpu/drm/udl/udl_connector.c @@ -61,6 +61,10 @@ static int udl_get_modes(struct drm_connector *connector) int ret; edid = (struct edid *)udl_get_edid(udl); + if (!edid) { + drm_mode_connector_update_edid_property(connector, NULL); + return 0; + } /* * We only read the main block, but if the monitor reports extension -- cgit v1.2.3 From 89ced125472b8551c65526934b7f6c733a6864fa Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Thu, 11 Apr 2013 14:26:55 +0000 Subject: drm/fb-helper: Fix locking in drm_fb_helper_hotplug_event Driver's and ->fill_modes functions are allowed to grab crtc mutexes (for e.g. load detect). Hence we need to first only grab the general kms mutex, and only in a second step grab all locks to do the modesets. This prevents a deadlock on my gm45 in the tv load detect code called by drm_helper_probe_single_connector_modes. Signed-off-by: Daniel Vetter Signed-off-by: Dave Airlie --- drivers/gpu/drm/drm_fb_helper.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 59d6b9bf204b..892ff9f95975 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -1544,10 +1544,10 @@ int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) if (!fb_helper->fb) return 0; - drm_modeset_lock_all(dev); + mutex_lock(&fb_helper->dev->mode_config.mutex); if (!drm_fb_helper_is_bound(fb_helper)) { fb_helper->delayed_hotplug = true; - drm_modeset_unlock_all(dev); + mutex_unlock(&fb_helper->dev->mode_config.mutex); return 0; } DRM_DEBUG_KMS("\n"); @@ -1558,9 +1558,11 @@ int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) count = drm_fb_helper_probe_connector_modes(fb_helper, max_width, max_height); + mutex_unlock(&fb_helper->dev->mode_config.mutex); + + drm_modeset_lock_all(dev); drm_setup_crtcs(fb_helper); drm_modeset_unlock_all(dev); - drm_fb_helper_set_par(fb_helper->fbdev); return 0; -- cgit v1.2.3