V4L/DVB: Remove videobuf_sg_alloc abuse

The cx88 and cx25821 drivers abuse videobuf_buffer to handle audio data.
Remove the abuse by creating private audio buffer structures with a
videobuf_dmabuf field.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2 files changed, 28 insertions, 30 deletions

diff --git a/drivers/media/video/cx88/cx88-alsa.c b/drivers/media/video/cx88/cx88-alsa.c
index 07fe905f6575..ba499d04de4d 100644
--- a/drivers/media/video/cx88/cx88-alsa.c
+++ b/drivers/media/video/cx88/cx88-alsa.c
@@ -54,6 +54,12 @@
         Data type declarations - Can be moded to a header file later
  ****************************************************************************/
 
+struct cx88_audio_buffer {
+        unsigned int               bpl;
+        struct btcx_riscmem        risc;
+        struct videobuf_dmabuf     dma;
+};
+
 struct cx88_audio_dev {
         struct cx88_core           *core;
         struct cx88_dmaqueue       q;
@@ -75,7 +81,7 @@ struct cx88_audio_dev {
 
         struct videobuf_dmabuf     *dma_risc;
 
-        struct cx88_buffer         *buf;
+        struct cx88_audio_buffer   *buf;
 
         struct snd_pcm_substream   *substream;
 };
@@ -123,7 +129,7 @@ MODULE_PARM_DESC(debug,"enable debug messages");
 
 static int _cx88_start_audio_dma(snd_cx88_card_t *chip)
 {
-        struct cx88_buffer   *buf = chip->buf;
+        struct cx88_audio_buffer *buf = chip->buf;
         struct cx88_core *core=chip->core;
         struct sram_channel *audio_ch = &cx88_sram_channels[SRAM_CH25];
 
@@ -376,7 +382,7 @@ static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
         snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
         struct videobuf_dmabuf *dma;
 
-        struct cx88_buffer *buf;
+        struct cx88_audio_buffer *buf;
         int ret;
 
         if (substream->runtime->dma_area) {
@@ -391,21 +397,16 @@ static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
         BUG_ON(!chip->dma_size);
         BUG_ON(chip->num_periods & (chip->num_periods-1));
 
-        buf = videobuf_sg_alloc(sizeof(*buf));
+        buf = kzalloc(sizeof(*buf), GFP_KERNEL);
         if (NULL == buf)
                 return -ENOMEM;
 
-        buf->vb.memory = V4L2_MEMORY_MMAP;
-        buf->vb.field  = V4L2_FIELD_NONE;
-        buf->vb.width  = chip->period_size;
-        buf->bpl       = chip->period_size;
-        buf->vb.height = chip->num_periods;
-        buf->vb.size   = chip->dma_size;
+        buf->bpl = chip->period_size;
 
-        dma = videobuf_to_dma(&buf->vb);
+        dma = &buf->dma;
         videobuf_dma_init(dma);
         ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
-                        (PAGE_ALIGN(buf->vb.size) >> PAGE_SHIFT));
+                        (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT));
         if (ret < 0)
                 goto error;
 
@@ -414,7 +415,7 @@ static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
                 goto error;
 
         ret = cx88_risc_databuffer(chip->pci, &buf->risc, dma->sglist,
-                                   buf->vb.width, buf->vb.height, 1);
+                                   chip->period_size, chip->num_periods, 1);
         if (ret < 0)
                 goto error;
 
@@ -422,8 +423,6 @@ static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP|RISC_IRQ1|RISC_CNT_INC);
         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
 
-        buf->vb.state = VIDEOBUF_PREPARED;
-
         chip->buf = buf;
         chip->dma_risc = dma;
 
diff --git a/drivers/staging/cx25821/cx25821-alsa.c b/drivers/staging/cx25821/cx25821-alsa.c
index 4ce8790b05ec..0771a6a313ad 100644
--- a/drivers/staging/cx25821/cx25821-alsa.c
+++ b/drivers/staging/cx25821/cx25821-alsa.c
@@ -55,6 +55,12 @@
 static struct snd_card *snd_cx25821_cards[SNDRV_CARDS];
 static int devno;
 
+struct cx25821_audio_buffer {
+        unsigned int bpl;
+        struct btcx_riscmem risc;
+        struct videobuf_dmabuf dma;
+};
+
 struct cx25821_audio_dev {
         struct cx25821_dev *dev;
         struct cx25821_dmaqueue q;
@@ -77,7 +83,7 @@ struct cx25821_audio_dev {
 
         struct videobuf_dmabuf *dma_risc;
 
-        struct cx25821_buffer *buf;
+        struct cx25821_audio_buffer *buf;
 
         struct snd_pcm_substream *substream;
 };
@@ -136,7 +142,7 @@ MODULE_PARM_DESC(debug, "enable debug messages");
 
 static int _cx25821_start_audio_dma(struct cx25821_audio_dev *chip)
 {
-        struct cx25821_buffer *buf = chip->buf;
+        struct cx25821_audio_buffer *buf = chip->buf;
         struct cx25821_dev *dev = chip->dev;
         struct sram_channel *audio_ch =
             &cx25821_sram_channels[AUDIO_SRAM_CHANNEL];
@@ -432,7 +438,7 @@ static int snd_cx25821_hw_params(struct snd_pcm_substream *substream,
         struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
         struct videobuf_dmabuf *dma;
 
-        struct cx25821_buffer *buf;
+        struct cx25821_audio_buffer *buf;
         int ret;
 
         if (substream->runtime->dma_area) {
@@ -447,25 +453,19 @@ static int snd_cx25821_hw_params(struct snd_pcm_substream *substream,
         BUG_ON(!chip->dma_size);
         BUG_ON(chip->num_periods & (chip->num_periods - 1));
 
-        buf = videobuf_sg_alloc(sizeof(*buf));
+        buf = kzalloc(sizeof(*buf), GFP_KERNEL);
         if (NULL == buf)
                 return -ENOMEM;
 
         if (chip->period_size > AUDIO_LINE_SIZE)
                 chip->period_size = AUDIO_LINE_SIZE;
 
-        buf->vb.memory = V4L2_MEMORY_MMAP;
-        buf->vb.field = V4L2_FIELD_NONE;
-        buf->vb.width = chip->period_size;
         buf->bpl = chip->period_size;
-        buf->vb.height = chip->num_periods;
-        buf->vb.size = chip->dma_size;
 
-        dma = videobuf_to_dma(&buf->vb);
+        dma = &buf->dma;
         videobuf_dma_init(dma);
-
         ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
-                                       (PAGE_ALIGN(buf->vb.size) >>
+                                       (PAGE_ALIGN(chip->dma_size) >>
                                         PAGE_SHIFT));
         if (ret < 0)
                 goto error;
@@ -476,7 +476,8 @@ static int snd_cx25821_hw_params(struct snd_pcm_substream *substream,
 
         ret =
             cx25821_risc_databuffer_audio(chip->pci, &buf->risc, dma->sglist,
-                                          buf->vb.width, buf->vb.height, 1);
+                                          chip->period_size, chip->num_periods,
+                                          1);
         if (ret < 0) {
                 printk(KERN_INFO
                         "DEBUG: ERROR after cx25821_risc_databuffer_audio()\n");
@@ -488,8 +489,6 @@ static int snd_cx25821_hw_params(struct snd_pcm_substream *substream,
         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
         buf->risc.jmp[2] = cpu_to_le32(0);      /* bits 63-32 */
 
-        buf->vb.state = VIDEOBUF_PREPARED;
-
         chip->buf = buf;
         chip->dma_risc = dma;