[RFCv2 PATCH 13/14] saa7134: don't rebuild the page table unless new_cookies is set.

[Hans Verkuil]

From: Hans Verkuil <hans.verk...@cisco.com>

Only if new_cookies is set do you need to build the page table,
otherwise it will be unchanged.

Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
---
 drivers/media/pci/saa7134/saa7134-ts.c    | 2 ++
 drivers/media/pci/saa7134/saa7134-vbi.c   | 2 ++
 drivers/media/pci/saa7134/saa7134-video.c | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/drivers/media/pci/saa7134/saa7134-ts.c 
b/drivers/media/pci/saa7134/saa7134-ts.c
index 2709b83..4095776 100644
--- a/drivers/media/pci/saa7134/saa7134-ts.c
+++ b/drivers/media/pci/saa7134/saa7134-ts.c
@@ -107,6 +107,8 @@ int saa7134_ts_buffer_prepare(struct vb2_buffer *vb2)
        vb2_set_plane_payload(vb2, 0, size);
        vb2->v4l2_buf.field = dev->field;
 
+       if (!vb2->new_cookies)
+               return 0;
        return saa7134_pgtable_build(dev->pci, &dmaq->pt, dma->sgl, dma->nents,
                                    saa7134_buffer_startpage(buf));
 }
diff --git a/drivers/media/pci/saa7134/saa7134-vbi.c 
b/drivers/media/pci/saa7134/saa7134-vbi.c
index e188903..5b422d0 100644
--- a/drivers/media/pci/saa7134/saa7134-vbi.c
+++ b/drivers/media/pci/saa7134/saa7134-vbi.c
@@ -131,6 +131,8 @@ static int buffer_prepare(struct vb2_buffer *vb2)
 
        vb2_set_plane_payload(vb2, 0, size);
 
+       if (!vb2->new_cookies)
+               return 0;
        return saa7134_pgtable_build(dev->pci, &dmaq->pt, dma->sgl, dma->nents,
                                    saa7134_buffer_startpage(buf));
 }
diff --git a/drivers/media/pci/saa7134/saa7134-video.c 
b/drivers/media/pci/saa7134/saa7134-video.c
index 15a686b..3ab39be 100644
--- a/drivers/media/pci/saa7134/saa7134-video.c
+++ b/drivers/media/pci/saa7134/saa7134-video.c
@@ -895,6 +895,8 @@ static int buffer_prepare(struct vb2_buffer *vb2)
        vb2_set_plane_payload(vb2, 0, size);
        vb2->v4l2_buf.field = dev->field;
 
+       if (!vb2->new_cookies)
+               return 0;
        return saa7134_pgtable_build(dev->pci, &dmaq->pt, dma->sgl, dma->nents,
                                    saa7134_buffer_startpage(buf));
 }
-- 
2.1.0

--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html