On Mon, Dec 06, 2010 at 02:30:52PM +0100, Jiri Slaby wrote:
> mem->dma_handle is a dma address obtained by dma_alloc_coherent which
> needn't be a physical address in presence of IOMMU. So ensure we are
Could you use PFN_DOWN(virt_to_phys(mem->vaddr)?
> remapping (remap_pfn_range) the right page in __videobuf_mmap_mapper
> by using virt_to_phys(mem->vaddr) and not mem->dma_handle.
>
> Signed-off-by: Jiri Slaby <jsl...@suse.cz>
> Cc: Mauro Carvalho Chehab <mche...@infradead.org>
> ---
> drivers/media/video/videobuf-dma-contig.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/media/video/videobuf-dma-contig.c
> b/drivers/media/video/videobuf-dma-contig.c
> index c969111..8d778aa 100644
> --- a/drivers/media/video/videobuf-dma-contig.c
> +++ b/drivers/media/video/videobuf-dma-contig.c
> @@ -300,7 +300,7 @@ static int __videobuf_mmap_mapper(struct videobuf_queue
> *q,
>
> vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
> retval = remap_pfn_range(vma, vma->vm_start,
> - mem->dma_handle >> PAGE_SHIFT,
> + virt_to_phys(mem->vaddr) >> PAGE_SHIFT,
> size, vma->vm_page_prot);
> if (retval) {
> dev_err(q->dev, "mmap: remap failed with error %d. ", retval);
> --
> 1.7.3.1
>
>
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