48 lines
1.4 KiB
Diff
48 lines
1.4 KiB
Diff
--- a/drivers/usb/gadget/function/uvc_video.c
|
|
+++ b/drivers/usb/gadget/function/uvc_video.c
|
|
@@
|
|
int uvcg_video_enable(struct uvc_video *video)
|
|
{
|
|
int ret;
|
|
|
|
+ if (!video) {
|
|
+ pr_err("uvcg_video_enable: missing video\n");
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ if (!video->uvc || !video->uvc->func.config ||
|
|
+ !video->uvc->func.config->cdev) {
|
|
+ pr_err("uvcg_video_enable: missing uvc/func/config video=%p uvc=%p\n",
|
|
+ video, video->uvc);
|
|
+ return -ENODEV;
|
|
+ }
|
|
+
|
|
if (video->ep == NULL) {
|
|
uvcg_info(&video->uvc->func,
|
|
"Video enable failed, device is uninitialized.\n");
|
|
return -ENODEV;
|
|
}
|
|
+
|
|
+ if (!video->kworker || !video->async_wq) {
|
|
+ uvcg_err(&video->uvc->func,
|
|
+ "Video enable failed, missing worker(s) kworker=%p async_wq=%p\n",
|
|
+ video->kworker, video->async_wq);
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ if (!video->queue.queue.dev) {
|
|
+ uvcg_err(&video->uvc->func,
|
|
+ "Video enable failed, missing queue device\n");
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ uvcg_info(&video->uvc->func,
|
|
+ "Video enable start: video=%p ep=%p kworker=%p async_wq=%p req_size=%u max_payload=%u requests=%u reqs_per_frame=%u use_sg=%u flags=0x%x\n",
|
|
+ video, video->ep, video->kworker, video->async_wq,
|
|
+ video->req_size, video->max_payload_size,
|
|
+ video->uvc_num_requests, video->reqs_per_frame,
|
|
+ video->queue.use_sg, video->queue.flags);
|
|
|
|
/*
|
|
* Safe to access request related fields without req_lock because
|