Hi all, When running run uvc-gadget application at HS using dwc3 gadget at Linux v5.10-rc1, the video stream will be stopped after 1-2 minutes running. The trace log like below, I wonder how _raw_spin_lock_irqsave calls __switch_to? Any hints? Thanks. usb_test# [ 4757.322728] configfs-gadget gadget: uvc: VS request completed with status -18. [ 4757.329971] configfs-gadget gadget: uvc: VS request completed with status -18. UVC: Possible USB shutdown requested from Host, seen during VIDIOC_DQBUF usb_test# [ 4812.376465] check_interval: 37 callbacks suppressed [ 4825.307665] configfs-gadget gadget: uvc: VS request completed with status -18. [ 4825.314912] configfs-gadget gadget: uvc: VS request completed with status -18. UVC: Possible USB shutdown requested from Host, seen during VIDIOC_DQBUF [ 4826.231392] check_interval: 3 callbacks suppressed select timeout [ 4827.336088] dwc3 38100000.dwc3: request 0000000080ebefd3 was not queued to ep2in [ 4827.343547] dwc3 38100000.dwc3: request 00000000b578605c was not queued to ep2in [ 4827.350989] dwc3 38100000.dwc3: request 00000000c6d191cd was not queued to ep2in [ 4827.358422] dwc3 38100000.dwc3: request 0000000085205409 was not queued to ep2in UVC: Stopping video stream. [ 4848.381718] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 4848.387824] rcu: 3-...0: (1 GPs behind) idle=162/1/0x4000000000000000 softirq=10819/10819 fqs=2356 [ 4848.396956] (detected by 2, t=5252 jiffies, g=20129, q=3770) [ 4848.396959] Task dump for CPU 3: [ 4848.405925] task:uvc-gadget_wlhe state:R running task stack: 0 pid: 674 ppid: 636 flags:0x00000202 [ 4848.415842] Call trace: [ 4848.418294] __switch_to+0xc0/0x170 [ 4848.421785] _raw_spin_lock_irqsave+0x84/0xb0 [ 4848.426143] composite_disconnect+0x28/0x78 [ 4848.430327] configfs_composite_disconnect+0x68/0x70 [ 4848.435290] usb_gadget_disconnect+0x10c/0x128 [ 4848.439733] usb_gadget_deactivate+0xd4/0x108 [ 4848.444089] usb_function_deactivate+0x6c/0x80 [ 4848.448534] uvc_function_disconnect+0x20/0x58 [ 4848.452976] uvc_v4l2_release+0x30/0x88 [ 4848.456812] v4l2_release+0xbc/0xf0 [ 4848.460301] __fput+0x7c/0x230 [ 4848.463353] ____fput+0x14/0x20 [ 4848.466495] task_work_run+0x88/0x140 [ 4848.470157] do_notify_resume+0x240/0x6f0 [ 4848.474166] work_pending+0x8/0x200 -- Thanks, Peter Chen
