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path: root/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
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Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c')
-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c b/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
index 0ea22fd112c9..b74eae2b8594 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
@@ -285,14 +285,17 @@ static int vmw_sou_crtc_set_config(struct drm_mode_set *set)
}
/* Only one active implicit frame-buffer at a time. */
+ mutex_lock(&dev_priv->global_kms_state_mutex);
if (sou->base.is_implicit &&
dev_priv->implicit_fb && vfb &&
!(dev_priv->num_implicit == 1 &&
sou->base.active_implicit) &&
dev_priv->implicit_fb != vfb) {
+ mutex_unlock(&dev_priv->global_kms_state_mutex);
DRM_ERROR("Multiple implicit framebuffers not supported.\n");
return -EINVAL;
}
+ mutex_unlock(&dev_priv->global_kms_state_mutex);
/* since they always map one to one these are safe */
connector = &sou->base.connector;