ivtv: Fix PCI DMA direction

The ivtv stream buffers may be for receive or for send but the attached
sg handle is always destined cpu->device.  We flush it correctly but the
allocation is wrongly done with the same type as the buffers.

See bug: http://bugzilla.kernel.org/show_bug.cgi?id=13385

(Note this doesn't close the bug - it fixes the ivtv part and in turn
the logging next shows up some rather alarming DMA sg list warnings in
libata)

Signed-off-by: Alan Cox <alan@linux.intel.com>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/media/video/ivtv/ivtv-queue.c b/drivers/media/video/ivtv/ivtv-queue.c
index ff7b7de..7fde36e 100644 (file)
--- a/drivers/media/video/ivtv/ivtv-queue.c
+++ b/drivers/media/video/ivtv/ivtv-queue.c
@@ -230,7 +230,8 @@ int ivtv_stream_alloc(struct ivtv_stream *s)
                return -ENOMEM;
        }
        if (ivtv_might_use_dma(s)) {
-               s->sg_handle = pci_map_single(itv->pdev, s->sg_dma, sizeof(struct ivtv_sg_element), s->dma);
+               s->sg_handle = pci_map_single(itv->pdev, s->sg_dma,
+                               sizeof(struct ivtv_sg_element), PCI_DMA_TODEVICE);
                ivtv_stream_sync_for_cpu(s);
        }