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drm: tweak getconnector locking

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We need to hold connection_mutex as we read the properties.  Easiest
thing is just widen the scope where connection_mutex is held.

Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Rob Clark 2014-12-18 16:01:48 -05:00 committed by Daniel Vetter
parent ac9c925616
commit ccfc08655d
1 changed files with 2 additions and 3 deletions
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5
drivers/gpu/drm/drm_crtc.c
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@ -2031,6 +2031,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
mutex_lock(&dev->mode_config.mutex);
drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
connector = drm_connector_find(dev, out_resp->connector_id);
if (!connector) {
@ -2062,14 +2063,11 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
out_resp->mm_height = connector->display_info.height_mm;
out_resp->subpixel = connector->display_info.subpixel_order;
out_resp->connection = connector->status;
drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
encoder = drm_connector_get_encoder(connector);
if (encoder)
out_resp->encoder_id = encoder->base.id;
else
out_resp->encoder_id = 0;
drm_modeset_unlock(&dev->mode_config.connection_mutex);
/*
* This ioctl is called twice, once to determine how much space is
@ -2135,6 +2133,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
out_resp->count_encoders = encoders_count;
out:
drm_modeset_unlock(&dev->mode_config.connection_mutex);
mutex_unlock(&dev->mode_config.mutex);
return ret;