X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=drivers%2Fgpu%2Fdrm%2Famd%2Famdgpu%2Famdgpu_irq.c;h=b4d36f0f2153c7d4b4e168980f9b7ab91238296b;hb=9e14c65c5715b16bcbf5d5c64de2bb8a973a0afa;hp=2187960baf7cdb43d783cc157594320b7254d5d1;hpb=d94aed5a6c947b1fda346aff1fa316dacf4a1a5a;p=firefly-linux-kernel-4.4.55.git

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
index 2187960baf7c..b4d36f0f2153 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
@@ -59,10 +59,12 @@ static void amdgpu_hotplug_work_func(struct work_struct *work)
 	struct drm_mode_config *mode_config = &dev->mode_config;
 	struct drm_connector *connector;
 
+	mutex_lock(&mode_config->mutex);
 	if (mode_config->num_connector) {
 		list_for_each_entry(connector, &mode_config->connector_list, head)
 			amdgpu_connector_hotplug(connector);
 	}
+	mutex_unlock(&mode_config->mutex);
 	/* Just fire off a uevent and let userspace tell us what to do */
 	drm_helper_hpd_irq_event(dev);
 }