Currently, the duplicated sg table is freed in the detach() and
the error path of map_dma_buf() ion's dma_buf_ops.
If a call to dma_buf_map_attachment() fails, the importer is
expected to call dma_buf_detach() to remove the attachment. This
will result in us trying to free the duped sg table twice.
Don't call free_duped_table() in ion_map_dma_buf() to avoid this.
Signed-off-by: Archit Taneja <architt@xxxxxxxxxxxxxx>
---
drivers/staging/android/ion/ion.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)
diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c
index 90ae6ce466ed..b483e1081309 100644
--- a/drivers/staging/android/ion/ion.c
+++ b/drivers/staging/android/ion/ion.c
@@ -268,20 +268,14 @@ static struct sg_table *ion_map_dma_buf(struct dma_buf_attachment *attachment,
{
struct ion_dma_buf_attachment *a = attachment->priv;
struct sg_table *table;
- int ret;
table = a->table;
if (!dma_map_sg(attachment->dev, table->sgl, table->nents,
- direction)){
- ret = -ENOMEM;
- goto err;
- }
- return table;
+ direction))
+ return ERR_PTR(-ENOMEM);
-err:
- free_duped_table(table);
- return ERR_PTR(ret);
+ return table;
}
static void ion_unmap_dma_buf(struct dma_buf_attachment *attachment,
--
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