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drm/nouveau/kms: take mode_config mutex in connector hotplug path 

fdo#93634

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Ben Skeggs 2016-01-08 08:56:51 +10:00
parent 2e7db87dee
commit 0a882cadbc
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/nouveau/nouveau_connector.c
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@ -983,10 +983,13 @@ nouveau_connector_hotplug(struct nvif_notify *notify)
NV_DEBUG(drm, "%splugged %s\n", plugged ? "" : "un", name); NV_DEBUG(drm, "%splugged %s\n", plugged ? "" : "un", name);
mutex_lock(&drm->dev->mode_config.mutex);
if (plugged) if (plugged)
drm_helper_connector_dpms(connector, DRM_MODE_DPMS_ON); drm_helper_connector_dpms(connector, DRM_MODE_DPMS_ON);
else else
drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF); drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
mutex_unlock(&drm->dev->mode_config.mutex);
drm_helper_hpd_irq_event(connector->dev); drm_helper_hpd_irq_event(connector->dev);
} }