diff options
| author | Junzhong Pan <panjunzhong@linux.spacemit.com> | 2026-03-06 11:30:09 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-03-11 16:19:04 +0100 |
| commit | 56135c0c60b07729401af9d329fa9c0eded845a6 (patch) | |
| tree | 87d9576d69af27cfed182d1084c5dcc3e69da898 | |
| parent | ae4ff9dead5efa2025eddfcdb29411432bf40a7c (diff) | |
usb: gadget: uvc: fix interval_duration calculation
To correctly convert bInterval as interval_duration:
interval_duration = 2^(bInterval-1) * frame_interval
Current code uses a wrong left shift operand, computing 2^bInterval
instead of 2^(bInterval-1).
Fixes: 010dc57cb516 ("usb: gadget: uvc: fix interval_duration calculation")
Cc: stable <stable@kernel.org>
Signed-off-by: Junzhong Pan <panjunzhong@linux.spacemit.com>
Reviewed-by: Xu Yang <xu.yang_2@nxp.com>
Link: https://patch.msgid.link/20260306-fix-uvc-interval-v1-1-9a2df6859859@linux.spacemit.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/gadget/function/uvc_video.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c index 7cea641b06b4..2f9700b3f1b6 100644 --- a/drivers/usb/gadget/function/uvc_video.c +++ b/drivers/usb/gadget/function/uvc_video.c @@ -513,7 +513,7 @@ uvc_video_prep_requests(struct uvc_video *video) return; } - interval_duration = 2 << (video->ep->desc->bInterval - 1); + interval_duration = 1 << (video->ep->desc->bInterval - 1); if (cdev->gadget->speed < USB_SPEED_HIGH) interval_duration *= 10000; else |