1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index 20ccc9d315dc..f839654ea436 100644
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -119,6 +119,14 @@ static void uvc_fixup_video_ctrl(struct uvc_streaming *stream,
                 ctrl->dwMaxVideoFrameSize =
                         frame->dwMaxVideoFrameBufferSize;
 
+        /* The "TOSHIBA Web Camera - 5M" Chicony device (04f2:b50b) seems to
+         * compute the bandwidth on 16 bits and erroneously sign-extend it to
+         * 32 bits, resulting in a huge bandwidth value. Detect and fix that
+         * condition by setting the 16 MSBs to 0 when they're all equal to 1.
+         */
+        if ((ctrl->dwMaxPayloadTransferSize & 0xffff0000) == 0xffff0000)
+                ctrl->dwMaxPayloadTransferSize &= ~0xffff0000;
+
         if (!(format->flags & UVC_FMT_FLAG_COMPRESSED) &&
             stream->dev->quirks & UVC_QUIRK_FIX_BANDWIDTH &&
             stream->intf->num_altsetting > 1) {