imx-drm: imx-drm-core: make imx_drm_crtc_register() safer

imx_drm_crtc_register() doesn't clean up the CRTC upon failure, which
leaves the CRTC attached to the DRM device.  Also, it does setup after
attaching the CRTC to the DRM device.

Fix this by reordering the function such that we do the setup before
drm_crtc_init(): this fixes both issues.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/imx-drm/imx-drm-core.c b/drivers/staging/imx-drm/imx-drm-core.c
index b52b8273d652752f4a2b98de37a3c9bfb232c110..19e431dee493eeb3f1e03b9c08de4b7be162b79e 100644 (file)
--- a/drivers/staging/imx-drm/imx-drm-core.c
+++ b/drivers/staging/imx-drm/imx-drm-core.c
@@ -377,8 +377,6 @@ static int imx_drm_crtc_register(struct imx_drm_crtc *imx_drm_crtc)
        struct imx_drm_device *imxdrm = __imx_drm_device();
        int ret;
 
-       drm_crtc_init(imxdrm->drm, imx_drm_crtc->crtc,
-                       imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs);
        ret = drm_mode_crtc_set_gamma_size(imx_drm_crtc->crtc, 256);
        if (ret)
                return ret;
@@ -386,6 +384,9 @@ static int imx_drm_crtc_register(struct imx_drm_crtc *imx_drm_crtc)
        drm_crtc_helper_add(imx_drm_crtc->crtc,
                        imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs);
 
+       drm_crtc_init(imxdrm->drm, imx_drm_crtc->crtc,
+                       imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs);
+
        drm_mode_group_reinit(imxdrm->drm);
 
        return 0;