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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>
This commit is contained in:
Russell King 2013-12-16 12:39:11 +00:00 committed by Greg Kroah-Hartman
parent 942325c8b2
commit 9fe73d46ed
1 changed files with 3 additions and 2 deletions
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5
drivers/staging/imx-drm/imx-drm-core.c
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@ -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(); struct imx_drm_device *imxdrm = __imx_drm_device();
int ret; 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); ret = drm_mode_crtc_set_gamma_size(imx_drm_crtc->crtc, 256);
if (ret) if (ret)
return 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, drm_crtc_helper_add(imx_drm_crtc->crtc,
imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs); 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); drm_mode_group_reinit(imxdrm->drm);
return 0; return 0;