[PATCH v2] dma_heap: use for_each_sgtable_sg in sg_table release flow

From: guangming.cao
Date: Thu Nov 25 2021 - 08:51:39 EST


From: Guangming <Guangming.Cao@xxxxxxxxxxxx>

Use (for_each_sgtable_sg) rather than (for_each_sg) to traverse
sg_table to free sg_table.
Use (for_each_sg) maybe will casuse some pages can't be freed
when send wrong nents number.

Signed-off-by: Guangming <Guangming.Cao@xxxxxxxxxxxx>
---
drivers/dma-buf/heaps/system_heap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma-buf/heaps/system_heap.c b/drivers/dma-buf/heaps/system_heap.c
index 23a7e74ef966..8660508f3684 100644
--- a/drivers/dma-buf/heaps/system_heap.c
+++ b/drivers/dma-buf/heaps/system_heap.c
@@ -289,7 +289,7 @@ static void system_heap_dma_buf_release(struct dma_buf *dmabuf)
int i;

table = &buffer->sg_table;
- for_each_sg(table->sgl, sg, table->nents, i) {
+ for_each_sgtable_sg(table, sg, i) {
struct page *page = sg_page(sg);

__free_pages(page, compound_order(page));
--
2.17.1