From: Noralf Trønnes <noralf@xxxxxxxxxxx>
commit 6e3f17ee73f7e3c2ef0e2c8fd8624b2ece8ef2c9 upstream.
Hotplug can happen while drm_fbdev_generic_setup() is running so move
drm_client_add() call after setup is done to avoid
drm_fbdev_client_hotplug() running in two threads at the same time.
Fixes: 9060d7f49376 ("drm/fb-helper: Finish the generic fbdev emulation")
Cc: stable@xxxxxxxxxxxxxxx
Reported-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Noralf Trønnes <noralf@xxxxxxxxxxx>
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20190401141358.25309-1-noralf@xxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_fb_helper.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -3317,8 +3317,6 @@ int drm_fbdev_generic_setup(struct drm_d
return ret;
}
- drm_client_add(&fb_helper->client);
-
if (!preferred_bpp)
preferred_bpp = dev->mode_config.preferred_depth;
if (!preferred_bpp)
@@ -3329,6 +3327,8 @@ int drm_fbdev_generic_setup(struct drm_d
if (ret)
DRM_DEV_DEBUG(dev->dev, "client hotplug ret=%d\n", ret);
+ drm_client_add(&fb_helper->client);
+
return 0;
}
EXPORT_SYMBOL(drm_fbdev_generic_setup);
