[media] cx23885: Stop the risc video fifo before reconfiguring it

Safety reasons. We shouldn't be trying to reconfigure a risc
processor instruction queue unless it's stopped.

Signed-off-by: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/cx23885/cx23885-video.c b/drivers/media/video/cx23885/cx23885-video.c
index c91be47..e730b92 100644 (file)
--- a/drivers/media/video/cx23885/cx23885-video.c
+++ b/drivers/media/video/cx23885/cx23885-video.c
@@ -549,6 +549,9 @@ static int cx23885_start_video_dma(struct cx23885_dev *dev,
 {
        dprintk(1, "%s()\n", __func__);
 
+       /* Stop the dma/fifo before we tamper with it's risc programs */
+       cx_clear(VID_A_DMA_CTL, 0x11);
+
        /* setup fifo + format */
        cx23885_sram_channel_setup(dev, &dev->sram_channels[SRAM_CH01],
                                buf->bpl, buf->risc.dma);