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drm/prime: fix to check return of dma_map_sg in prime helper

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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 <yj44.cho@samsung.com>
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
YoungJun Cho 2013-06-24 15:34:21 +09:00 committed by Dave Airlie
parent 2e07fb2293
commit b720d54a5c
1 changed files with 7 additions and 2 deletions
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9
drivers/gpu/drm/drm_prime.c
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@ -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;