drm/sun4i: fix missing component unbind on bind errors

commit 5622a01b987fa52bf7308a379a435f35d4f1df3e upstream.

Make sure to unbind all subcomponents when binding the aggregate device
fails.

Fixes: e656da9b8498 ("drm: Add Allwinner A10 Display Engine support")
Cc: stable@vger.kernel.org      # 4.7
Cc: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20230306103242.4775-1-johan+linaro@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
index d06ffd99d86e157523f082673ca67affd83f392c..7910c5853f0a89166900c5b87bc8785821019b79 100644 (file)
--- a/drivers/gpu/drm/sun4i/sun4i_drv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -95,12 +95,12 @@ static int sun4i_drv_bind(struct device *dev)
        /* drm_vblank_init calls kcalloc, which can fail */
        ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
        if (ret)
-               goto cleanup_mode_config;
+               goto unbind_all;
 
        /* Remove early framebuffers (ie. simplefb) */
        ret = drm_aperture_remove_framebuffers(false, &sun4i_drv_driver);
        if (ret)
-               goto cleanup_mode_config;
+               goto unbind_all;
 
        sun4i_framebuffer_init(drm);
 
@@ -119,6 +119,8 @@ static int sun4i_drv_bind(struct device *dev)
 
 finish_poll:
        drm_kms_helper_poll_fini(drm);
+unbind_all:
+       component_unbind_all(dev, NULL);
 cleanup_mode_config:
        drm_mode_config_cleanup(drm);
        of_reserved_mem_device_release(dev);