From: Noralf Trønnes Date: Mon, 1 Apr 2019 14:13:58 +0000 (+0200) Subject: drm/fb-helper: generic: Call drm_client_add() after setup is done X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=6e3f17ee73f7e3c2ef0e2c8fd8624b2ece8ef2c9;p=openwrt%2Fstaging%2Fblogic.git drm/fb-helper: generic: Call drm_client_add() after setup is done 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@vger.kernel.org Reported-by: Daniel Vetter Signed-off-by: Noralf Trønnes Reviewed-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20190401141358.25309-1-noralf@tronnes.org --- diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 0d8384e30e16..84791dd4a90d 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -3312,8 +3312,6 @@ int drm_fbdev_generic_setup(struct drm_device *dev, unsigned int preferred_bpp) return ret; } - drm_client_add(&fb_helper->client); - if (!preferred_bpp) preferred_bpp = dev->mode_config.preferred_depth; if (!preferred_bpp) @@ -3324,6 +3322,8 @@ int drm_fbdev_generic_setup(struct drm_device *dev, unsigned int preferred_bpp) 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);