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drm/nouveau/kms: take mode_config mutex in connector hotplug path
author
Ben Skeggs
<bskeggs@redhat.com>
Thu, 7 Jan 2016 22:56:51 +0000
(08:56 +1000)
committer
Ben Skeggs
<bskeggs@redhat.com>
Mon, 11 Jan 2016 01:29:36 +0000
(11:29 +1000)
fdo#93634
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org
drivers/gpu/drm/nouveau/nouveau_connector.c
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diff --git
a/drivers/gpu/drm/nouveau/nouveau_connector.c
b/drivers/gpu/drm/nouveau/nouveau_connector.c
index
84e63b5
..
fcebfae
100644
(file)
--- a/
drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/
drivers/gpu/drm/nouveau/nouveau_connector.c
@@
-983,10
+983,13
@@
nouveau_connector_hotplug(struct nvif_notify *notify)
NV_DEBUG(drm, "%splugged %s\n", plugged ? "" : "un", name);
+ mutex_lock(&drm->dev->mode_config.mutex);
if (plugged)
drm_helper_connector_dpms(connector, DRM_MODE_DPMS_ON);
else
drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
+ mutex_unlock(&drm->dev->mode_config.mutex);
+
drm_helper_hpd_irq_event(connector->dev);
}