1 files changed, 15 insertions, 1 deletions

diff --git a/drivers/media/video/saa7134/saa7134-alsa.c b/drivers/media/video/saa7134/saa7134-alsa.c
index c6f7279669c1..b9c5cf7dc849 100644
--- a/drivers/media/video/saa7134/saa7134-alsa.c
+++ b/drivers/media/video/saa7134/saa7134-alsa.c
@@ -543,8 +543,10 @@ static int snd_card_saa7134_hw_params(struct snd_pcm_substream * substream,
            V4L functions, and force ALSA to use that as the DMA area */
 
         substream->runtime->dma_area = dev->dmasound.dma.vmalloc;
+        substream->runtime->dma_bytes = dev->dmasound.bufsize;
+        substream->runtime->dma_addr = 0;
 
-        return 1;
+        return 0;
 
 }
 
@@ -652,6 +654,17 @@ static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream)
 }
 
 /*
+ * page callback (needed for mmap)
+ */
+
+static struct page *snd_card_saa7134_page(struct snd_pcm_substream *substream,
+                                        unsigned long offset)
+{
+        void *pageptr = substream->runtime->dma_area + offset;
+        return vmalloc_to_page(pageptr);
+}
+
+/*
  * ALSA capture callbacks definition
  */
 
@@ -664,6 +677,7 @@ static struct snd_pcm_ops snd_card_saa7134_capture_ops = {
         .prepare =              snd_card_saa7134_capture_prepare,
         .trigger =              snd_card_saa7134_capture_trigger,
         .pointer =              snd_card_saa7134_capture_pointer,
+        .page =                 snd_card_saa7134_page,
 };
 
 /*