From 0a882cadbc63fd2da3994af7115b4ada2fcbd638 Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Fri, 8 Jan 2016 08:56:51 +1000 Subject: [PATCH] drm/nouveau/kms: take mode_config mutex in connector hotplug path fdo#93634 Signed-off-by: Ben Skeggs Cc: stable@vger.kernel.org --- drivers/gpu/drm/nouveau/nouveau_connector.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index 84e63b55037e..fcebfae5d426 100644 --- 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); }