[PATCH 4.4 192/342] drm/nouveau/kms: take mode_config mutex in connector hotplug path
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2016-03-02 00:49:25
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4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ben Skeggs <redacted> commit 0a882cadbc63fd2da3994af7115b4ada2fcbd638 upstream. fdo#93634 Signed-off-by: Ben Skeggs <redacted> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/gpu/drm/nouveau/nouveau_connector.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c@@ -969,10 +969,13 @@ nouveau_connector_hotplug(struct nvif_no 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); }