[media] msi3101: correct max videobuf2 alloc

There was too small buffers requested in worst case.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/staging/media/msi3101/sdr-msi3101.c b/drivers/staging/media/msi3101/sdr-msi3101.c
index 7715c85064d7..4c3bf776bb20 100644
--- a/drivers/staging/media/msi3101/sdr-msi3101.c
+++ b/drivers/staging/media/msi3101/sdr-msi3101.c
@@ -1131,7 +1131,13 @@ static int msi3101_queue_setup(struct vb2_queue *vq,
         /* Absolute min and max number of buffers available for mmap() */
         *nbuffers = 32;
         *nplanes = 1;
-        sizes[0] = PAGE_ALIGN(3 * 3072); /* 3 * 768 * 4 */
+        /*
+         *   3, wMaxPacketSize 3x 1024 bytes
+         * 504, max IQ sample pairs per 1024 frame
+         *   2, two samples, I and Q
+         *   4, 32-bit float
+         */
+        sizes[0] = PAGE_ALIGN(3 * 504 * 2 * 4); /* = 12096 */
         dev_dbg(&s->udev->dev, "%s: nbuffers=%d sizes[0]=%d\n",
                         __func__, *nbuffers, sizes[0]);
         return 0;