diff options
| -rw-r--r-- | drivers/media/video/gspca/gspca.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c index 5b8f4fc5d1c6..a82d45e57896 100644 --- a/drivers/media/video/gspca/gspca.c +++ b/drivers/media/video/gspca/gspca.c @@ -698,12 +698,17 @@ static int build_isoc_ep_tb(struct gspca_dev *gspca_dev, USB_ENDPOINT_XFER_ISOC); if (ep == NULL) continue; + if (ep->desc.bInterval == 0) { + pr_err("alt %d iso endp with 0 interval\n", j); + continue; + } psize = le16_to_cpu(ep->desc.wMaxPacketSize); psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); - bandwidth = psize * ep->desc.bInterval * 1000; + bandwidth = psize * 1000; if (gspca_dev->dev->speed == USB_SPEED_HIGH || gspca_dev->dev->speed == USB_SPEED_SUPER) bandwidth *= 8; + bandwidth /= 1 << (ep->desc.bInterval - 1); if (bandwidth <= last_bw) continue; if (bandwidth < ep_tb->bandwidth) { |