[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>

diff --git a/drivers/staging/media/msi3101/sdr-msi3101.c b/drivers/staging/media/msi3101/sdr-msi3101.c
index 7715c85..4c3bf77 100644 (file)
--- 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;