mode_config should be locked when calling drm_helper_resume_force_mode.
This patch adds the lock, similar to #927a2f119.
Cc: stable@xxxxxxxxxx
Signed-off-by: Peter Huewe <peterhuewe@xxxxxx>
---
drivers/gpu/drm/radeon/radeon_device.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index ea7df16..d287f23 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -973,7 +973,9 @@ int radeon_resume_kms(struct drm_device *dev)
/* reset hpd state */
radeon_hpd_init(rdev);
/* blat the mode back in */
+ mutex_lock(&dev->mode_config.mutex);
drm_helper_resume_force_mode(dev);
+ mutex_unlock(&dev->mode_config.mutex);
/* turn on display hw */
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
drm_helper_connector_dpms(connector, DRM_MODE_DPMS_ON);
--
1.7.3.4
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