With
commit 7a3f3d6667f5f9ffd1517f6b21d64bbf5312042c
Author: Daniel Vetter <daniel.vetter@xxxxxxxx>
Date: Thu Jul 9 23:44:28 2015 +0200
drm: Check locking in drm_for_each_connector
we started checking the locking in drm_for_each_connector but somehow
I totally missed drm_mode_config_reset. There's no problem there since
this function should only be called in single-threaded contexts
(driver load or resume), so just wrap the loop with the right lock.
v2: Drink coffee and all that ...
Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Reported-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
---
drivers/gpu/drm/drm_crtc.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index c91c18b2b1d4..10c1a0f6680c 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -5273,9 +5273,11 @@ void drm_mode_config_reset(struct drm_device *dev)
if (encoder->funcs->reset)
encoder->funcs->reset(encoder);
+ mutex_lock(&dev->mode_config.mutex);
drm_for_each_connector(connector, dev)
if (connector->funcs->reset)
connector->funcs->reset(connector);
+ mutex_unlock(&dev->mode_config.mutex);
}
EXPORT_SYMBOL(drm_mode_config_reset);
--
2.1.4
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