From b720d54a5caf077011f0dc6ba7792866d2828d16 Mon Sep 17 00:00:00 2001 From: YoungJun Cho Date: Mon, 24 Jun 2013 15:34:21 +0900 Subject: [PATCH] drm/prime: fix to check return of dma_map_sg in prime helper The dma_map_sg(), in map_dma_buf callback operation of prime helper, can return 0 when it fails to map, so it needs to release related resources. Signed-off-by: YoungJun Cho Signed-off-by: Seung-Woo Kim Signed-off-by: Kyungmin Park Signed-off-by: Dave Airlie --- drivers/gpu/drm/drm_prime.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index e57c675db840..0daf2122a91d 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -97,8 +97,13 @@ static struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach, sgt = obj->dev->driver->gem_prime_get_sg_table(obj); - if (!IS_ERR_OR_NULL(sgt)) - dma_map_sg(attach->dev, sgt->sgl, sgt->nents, dir); + if (!IS_ERR_OR_NULL(sgt)) { + if (!dma_map_sg(attach->dev, sgt->sgl, sgt->nents, dir)) { + sg_free_table(sgt); + kfree(sgt); + sgt = ERR_PTR(-ENOMEM); + } + } mutex_unlock(&obj->dev->struct_mutex); return sgt; -- 2.20.1