[PATCH v2 3/4] fix vmap_udmabuf error page set
From: Huan Yang
Date: Sun Aug 04 2024 - 23:26:50 EST
Currently vmap_udmabuf set page's array by each folio.
But, ubuf->folios is only contain's the folio's head page.
That mean we repeatedly mapped the folio head page to the vmalloc area.
This patch fix it, set each folio's page correct, so that pages array
contains right page, and then map into vmalloc area
Signed-off-by: Huan Yang <link@xxxxxxxx>
---
drivers/dma-buf/udmabuf.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c
index af2391cea0bf..9737f063b6b3 100644
--- a/drivers/dma-buf/udmabuf.c
+++ b/drivers/dma-buf/udmabuf.c
@@ -78,7 +78,8 @@ static int vmap_udmabuf(struct dma_buf *buf, struct iosys_map *map)
return -ENOMEM;
for (pg = 0; pg < ubuf->pagecount; pg++)
- pages[pg] = &ubuf->folios[pg]->page;
+ pages[pg] = folio_page(ubuf->folios[pg],
+ ubuf->offsets[pg] >> PAGE_SHIFT);
vaddr = vm_map_ram(pages, ubuf->pagecount, -1);
kvfree(pages);
--
2.45.2