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drm: Fixup locking WARNINGs in drm_mode_config_reset 

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commit 7a3f3d6667
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
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@ideasonboard.com>
Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
This commit is contained in:
Daniel Vetter 2015-07-29 08:32:43 +02:00
parent bf9e37baac
commit f8c2ba316b
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/drm_crtc.c
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@ -5273,12 +5273,14 @@ 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) {
connector->status = connector_status_unknown;
if (connector->funcs->reset)
connector->funcs->reset(connector);
}
mutex_unlock(&dev->mode_config.mutex);
}
EXPORT_SYMBOL(drm_mode_config_reset);