linux-kernel - [PATCH 1/2] drm/imx: ipuv3-crtc: Return error if ipu_plane

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Date:	Wed, 4 Nov 2015 18:15:57 +0800
From:	Liu Ying <Ying.Liu@...escale.com>
To:	<dri-devel@...ts.freedesktop.org>
CC:	<linux-kernel@...r.kernel.org>, <p.zabel@...gutronix.de>,
	<airlied@...ux.ie>
Subject: [PATCH 1/2] drm/imx: ipuv3-crtc: Return error if ipu_plane_init() fails for primary plane

For primary plane initialization failure cases, ipu_plane_init() may return
a pointer encoded by ERR_PTR(). So, we should bailout instead of use that
pointer blindly.

Signed-off-by: Liu Ying <Ying.Liu@...escale.com>
---
 drivers/gpu/drm/imx/ipuv3-crtc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/imx/ipuv3-crtc.c b/drivers/gpu/drm/imx/ipuv3-crtc.c
index 7bc8301..8d68697 100644
--- a/drivers/gpu/drm/imx/ipuv3-crtc.c
+++ b/drivers/gpu/drm/imx/ipuv3-crtc.c
@@ -370,6 +370,10 @@ static int ipu_crtc_init(struct ipu_crtc *ipu_crtc,
 	id = imx_drm_crtc_id(ipu_crtc->imx_crtc);
 	ipu_crtc->plane[0] = ipu_plane_init(ipu_crtc->base.dev, ipu,
 					    pdata->dma[0], dp, BIT(id), true);
+	if (IS_ERR(ipu_crtc->plane[0])) {
+		ret = PTR_ERR(ipu_crtc->plane[0]);
+		goto err_put_resources;
+	}
 	ret = ipu_plane_get_resources(ipu_crtc->plane[0]);
 	if (ret) {
 		dev_err(ipu_crtc->dev, "getting plane 0 resources failed with %d.\n",
-- 
2.5.0

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