From: Muralidharan Karicheri <m-karicheri2@xxxxxx> If a USERPTR address that is not aligned to page boundary is passed to the videobuf_dma_contig_user_get() function, it saves a page aligned address to the dma_handle. This is not correct. This issue is observed when using USERPTR IO machism for buffer exchange. Signed-off-by: Muralidharan Karicheri <m-karicheri2@xxxxxx> --- Applies to V4L-DVB linux-next branch drivers/media/video/videobuf-dma-contig.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/drivers/media/video/videobuf-dma-contig.c b/drivers/media/video/videobuf-dma-contig.c index d25f284..928dfa1 100644 --- a/drivers/media/video/videobuf-dma-contig.c +++ b/drivers/media/video/videobuf-dma-contig.c @@ -166,7 +166,8 @@ static int videobuf_dma_contig_user_get(struct videobuf_dma_contig_memory *mem, break; if (pages_done == 0) - mem->dma_handle = this_pfn << PAGE_SHIFT; + mem->dma_handle = (this_pfn << PAGE_SHIFT) + + (vb->baddr & ~PAGE_MASK); else if (this_pfn != (prev_pfn + 1)) ret = -EFAULT; -- 1.6.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
