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| author | Ma Ke <make_ruc2021@163.com> | 2023-10-03 12:13:15 +0300 |
|---|---|---|
| committer | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2023-10-13 12:33:22 +0300 |
| commit | feec1b29d7a81be3c1a0a0865eed67d05d4089c9 (patch) | |
| tree | 093f969704ca90997cf1949c617bd7f56b04e3c6 /drivers/media | |
| parent | be521bf7bfad4e4bd4c3e1d2853aeb563a1e51d6 (diff) | |
| download | linux-feec1b29d7a81be3c1a0a0865eed67d05d4089c9.tar.xz | |
media: videobuf2: Fix IS_ERR checking in vb2_vmalloc_put_userptr()
In order to avoid error pointers from frame_vector_pages(), we could
use IS_ERR() to check the return value to fix this. This checking
operation could make sure that vector contains pages.
Signed-off-by: Ma Ke <make_ruc2021@163.com>
Acked-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil: add space between ){]
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/common/videobuf2/videobuf2-vmalloc.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/media/common/videobuf2/videobuf2-vmalloc.c b/drivers/media/common/videobuf2/videobuf2-vmalloc.c index 7c635e292106..7d953706f3f8 100644 --- a/drivers/media/common/videobuf2/videobuf2-vmalloc.c +++ b/drivers/media/common/videobuf2/videobuf2-vmalloc.c @@ -133,13 +133,15 @@ static void vb2_vmalloc_put_userptr(void *buf_priv) if (!buf->vec->is_pfns) { n_pages = frame_vector_count(buf->vec); - pages = frame_vector_pages(buf->vec); if (vaddr) vm_unmap_ram((void *)vaddr, n_pages); if (buf->dma_dir == DMA_FROM_DEVICE || - buf->dma_dir == DMA_BIDIRECTIONAL) - for (i = 0; i < n_pages; i++) - set_page_dirty_lock(pages[i]); + buf->dma_dir == DMA_BIDIRECTIONAL) { + pages = frame_vector_pages(buf->vec); + if (!WARN_ON_ONCE(IS_ERR(pages))) + for (i = 0; i < n_pages; i++) + set_page_dirty_lock(pages[i]); + } } else { iounmap((__force void __iomem *)buf->vaddr); } |