[PATCH] dma_heap: use sg_table.orig_nents in sg_table release flow
From: <hidden>
Date: 2021-11-25 12:48:13
Also in:
dri-devel, linux-media, linux-mediatek, lkml
Subsystem:
dma buffer sharing framework, dma-buf heaps framework, the rest · Maintainers:
Sumit Semwal, Christian König, Linus Torvalds
From: Guangming <redacted> Use (sg_table.orig_nents) rather than (sg_table.nents) to traverse sg_table to free sg_table. Use (sg_table.nents) maybe will casuse some pages can't be freed. Signed-off-by: Guangming <redacted> --- 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..ce10d4eb674c 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_sg(table->sgl, sg, table->orig_nents, i) { struct page *page = sg_page(sg); __free_pages(page, compound_order(page));
--
2.17.1
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