diff mbox series

[1/2] udmabuf: fix vmap_udmabuf error page set

Message ID 20240731090233.1343559-1-link@vivo.com (mailing list archive)
State New, archived
Headers show
Series [1/2] udmabuf: fix vmap_udmabuf error page set | expand

Commit Message

Huan Yang July 31, 2024, 9:02 a.m. UTC 
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@vivo.com>
---
 drivers/dma-buf/udmabuf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)


base-commit: cd19ac2f903276b820f5d0d89de0c896c27036ed
diff mbox series

Patch

diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c
index 047c3cd2ceff..6604d91e7072 100644
--- a/drivers/dma-buf/udmabuf.c
+++ b/drivers/dma-buf/udmabuf.c
@@ -85,7 +85,8 @@  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);
 	kfree(pages);