[PATCH] usb: gadget: uvc: fix interval_duration calculation

[Junzhong Pan]

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@xxxxxxxxxxxxxxx
Signed-off-by: Junzhong Pan <panjunzhong@xxxxxxxxxxxxxxxxxx>
---
 drivers/usb/gadget/function/uvc_video.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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

---
base-commit: 5ee8dbf54602dc340d6235b1d6aa17c0f283f48c
change-id: 20260306-fix-uvc-interval-0dc36dbde48e

Best regards,
-- 
Junzhong Pan <panjunzhong@xxxxxxxxxxxxxxxxxx>