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udmabuf: fix vmap missed offset page

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[ Upstream commit a26fd92b72 ]

Before invoke vmap, we need offer a pages pointer array which each page
need to map in vmalloc area.

But currently vmap_udmabuf only set each folio's head page into pages,
missed each offset pages when iter.

This patch set the correctly offset page in each folio into array.

Signed-off-by: Huan Yang <link@vivo.com>
Fixes: 5e72b2b41a ("udmabuf: convert udmabuf driver to use folios")
Acked-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Link: https://lore.kernel.org/r/20250428073831.19942-3-link@vivo.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Huan Yang 2025-04-28 15:38:30 +08:00 committed by Greg Kroah-Hartman
parent c467d6c2bb
commit 609a259e9b
1 changed files with 2 additions and 1 deletions
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3
drivers/dma-buf/udmabuf.c
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@ -120,7 +120,8 @@ 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);