media: videobuf2-dma-contig: Invalidate vmap range before DMA range

Christoph suggests [1] that invalidating vmap range before
direct mapping range makes more sense.

[1]: https://lore.kernel.org/all/20220111085958.GA22795@lst.de/

Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Sergey Senozhatsky 2022-01-19 09:14:17 +01:00 committed by Mauro Carvalho Chehab
parent 68d0c3311e
commit 553189144c

View File

@ -132,12 +132,12 @@ static void vb2_dc_prepare(void *buf_priv)
if (!buf->non_coherent_mem)
return;
/* For both USERPTR and non-coherent MMAP */
dma_sync_sgtable_for_device(buf->dev, sgt, buf->dma_dir);
/* Non-coherent MMAP only */
if (buf->vaddr)
flush_kernel_vmap_range(buf->vaddr, buf->size);
/* For both USERPTR and non-coherent MMAP */
dma_sync_sgtable_for_device(buf->dev, sgt, buf->dma_dir);
}
static void vb2_dc_finish(void *buf_priv)
@ -152,12 +152,12 @@ static void vb2_dc_finish(void *buf_priv)
if (!buf->non_coherent_mem)
return;
/* For both USERPTR and non-coherent MMAP */
dma_sync_sgtable_for_cpu(buf->dev, sgt, buf->dma_dir);
/* Non-coherent MMAP only */
if (buf->vaddr)
invalidate_kernel_vmap_range(buf->vaddr, buf->size);
/* For both USERPTR and non-coherent MMAP */
dma_sync_sgtable_for_cpu(buf->dev, sgt, buf->dma_dir);
}
/*********************************************/