diff options
| author | Roger Quadros <rogerq@ti.com> | 2017-03-08 16:05:43 +0200 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2017-03-22 11:21:09 +0200 |
| commit | 09424c50b7dff40cb30011c09114404a4656e023 (patch) | |
| tree | e48ed2d80dce86f37cc771e359c1ea352eae22e6 /drivers/usb | |
| parent | 74098c4ac782afd71b35ac56f9536ae2f5cd7da7 (diff) | |
| download | linux-09424c50b7dff40cb30011c09114404a4656e023.tar.bz2 | |
usb: gadget: f_uvc: Fix SuperSpeed companion descriptor's wBytesPerInterval
The streaming_maxburst module parameter is 0 offset (0..15)
so we must add 1 while using it for wBytesPerInterval
calculation for the SuperSpeed companion descriptor.
Without this host uvcvideo driver will always see the wrong
wBytesPerInterval for SuperSpeed uvc gadget and may not find
a suitable video interface endpoint.
e.g. for streaming_maxburst = 0 case it will always
fail as wBytePerInterval was evaluating to 0.
Cc: stable@vger.kernel.org
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/gadget/function/f_uvc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c index 29b41b5dee04..c7689d05356c 100644 --- a/drivers/usb/gadget/function/f_uvc.c +++ b/drivers/usb/gadget/function/f_uvc.c @@ -625,7 +625,7 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f) uvc_ss_streaming_comp.bMaxBurst = opts->streaming_maxburst; uvc_ss_streaming_comp.wBytesPerInterval = cpu_to_le16(max_packet_size * max_packet_mult * - opts->streaming_maxburst); + (opts->streaming_maxburst + 1)); /* Allocate endpoints. */ ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep); |