From: Subash Patel <subash.rp@samsung.com>
Date: Mon, 25 Jun 2012 18:22:57 +0000 (-0700)
Subject: drm/exynos: check for null in return value of dma_buf_map_attachment()
X-Git-Tag: v3.6-rc1~59^2~13
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0dd3b72cc66117e5c6dc638f55e4f2e5cc60ed70;p=profile%2Fivi%2Fkernel-x86-ivi.git

drm/exynos: check for null in return value of dma_buf_map_attachment()

dma_buf_map_attachment() can return NULL and valid sg as return
value. Hence the check for the returned scatter-gather must be using
the inline function IS_ERR_OR_NULL() in place of IS_ERR()

Signed-off-by: Subash Patel <subash.ramaswamy@linaro.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
index cb29e47..1687b72 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
@@ -214,7 +214,7 @@ struct drm_gem_object *exynos_dmabuf_prime_import(struct drm_device *drm_dev,
 
 
 	sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL);
-	if (IS_ERR(sgt)) {
+	if (IS_ERR_OR_NULL(sgt)) {
 		ret = PTR_ERR(sgt);
 		goto err_buf_detach;
 	}