[PATCH 3.2 011/110] drm/radeon: take the mode_config mutex when dealing with hpds (v2)

From: Ben Hutchings
Date: Mon Aug 10 2015 - 06:19:29 EST

3.2.71-rc1 review patch. If anyone has any objections, please let me know.


From: Alex Deucher <alexander.deucher@xxxxxxx>

commit 39fa10f7e21574a70cecf1fed0f9b36535aa68a0 upstream.

Since we are messing with state in the worker.

v2: drop the changes in the mst worker

Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
drivers/gpu/drm/radeon/radeon_irq_kms.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -51,10 +51,12 @@ static void radeon_hotplug_work_func(str
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)
+ mutex_unlock(&mode_config->mutex);
/* Just fire off a uevent and let userspace tell us what to do */

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