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[v7,9/9] usb: gadget: uvc: dont call usb_composite_setup_continue when not streaming

Message ID 20240403-uvc_request_length_by_interval-v7-9-e224bb1035f0@pengutronix.de
State New
Headers show
Series usb: gadget: uvc: effectively fill the udc isoc pipeline with available video buffers and fixes | expand

Commit Message

Michael Grzeschik Oct. 16, 2024, 1:58 p.m. UTC 
If the streamoff call was triggered by some previous disconnect
or userspace application shutdown the uvc_function_setup_continue
should not be called and the state should not be overwritten.

For this situation the set_alt(0) was never called and the streaming ep
has no USB_GADGET_DELAYED_STATUS pending.

Since the state then was already updated before we also omit the state
update.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>

---
v5 -> v7: -
v1 -> v5: - new patch
---
 drivers/usb/gadget/function/uvc_v4l2.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/usb/gadget/function/uvc_v4l2.c b/drivers/usb/gadget/function/uvc_v4l2.c
index ab89f1630acb0..3492855f0fb29 100644
--- a/drivers/usb/gadget/function/uvc_v4l2.c
+++ b/drivers/usb/gadget/function/uvc_v4l2.c
@@ -546,6 +546,9 @@  uvc_v4l2_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
 	if (ret < 0)
 		return ret;
 
+	if (uvc->state != UVC_STATE_STREAMING)
+		return 0;
+
 	uvc->state = UVC_STATE_CONNECTED;
 	uvc_function_setup_continue(uvc, 1);
 	return 0;