Comment 4 for bug 1953674

Repro on 510. Stack traces that happens some times:

Feb 09 06:30:47.610121 ciro-p51 kernel: WARNING: CPU: 0 PID: 18016 at /var/lib/dkms/nvidia/510.47.03/build/nvidia/nv.c:3935 nv_restore_user_channels+0xce/0xe0 [nvidia]

Feb 09 06:30:47.610508 ciro-p51 kernel: Call Trace:
Feb 09 06:30:47.610527 ciro-p51 kernel: <TASK>
Feb 09 06:30:47.610547 ciro-p51 kernel: nv_set_system_power_state+0x22b/0x3e0 [nvidia]
Feb 09 06:30:47.610566 ciro-p51 kernel: nv_procfs_write_suspend+0xe9/0x140 [nvidia]
Feb 09 06:30:47.610598 ciro-p51 kernel: proc_reg_write+0x5a/0x90
Feb 09 06:30:47.610619 ciro-p51 kernel: ? __cond_resched+0x1a/0x50
Feb 09 06:30:47.610637 ciro-p51 kernel: vfs_write+0xc3/0x250
Feb 09 06:30:47.610658 ciro-p51 kernel: ksys_write+0x67/0xe0
Feb 09 06:30:47.610675 ciro-p51 kernel: __x64_sys_write+0x19/0x20
Feb 09 06:30:47.610693 ciro-p51 kernel: do_syscall_64+0x61/0xb0
Feb 09 06:30:47.610709 ciro-p51 kernel: ? exit_to_user_mode_prepare+0x37/0xb0
Feb 09 06:30:47.610728 ciro-p51 kernel: ? syscall_exit_to_user_mode+0x27/0x50
Feb 09 06:30:47.610746 ciro-p51 kernel: ? __x64_sys_newfstatat+0x1c/0x20
Feb 09 06:30:47.610765 ciro-p51 kernel: ? do_syscall_64+0x6e/0xb0
Feb 09 06:30:47.610796 ciro-p51 kernel: ? syscall_exit_to_user_mode+0x27/0x50
Feb 09 06:30:47.610813 ciro-p51 kernel: ? do_syscall_64+0x6e/0xb0
Feb 09 06:30:47.610842 ciro-p51 kernel: ? asm_exc_page_fault+0x8/0x30
Feb 09 06:30:47.610860 ciro-p51 kernel: entry_SYSCALL_64_after_hwframe+0x44/0xae

Feb 09 06:30:47.611093 ciro-p51 kernel: WARNING: CPU: 0 PID: 18016 at /var/lib/dkms/nvidia/510.47.03/build/nvidia/nv.c:4152 nv_set_system_power_state+0x2d0/0x3e0 [nvidia]

Feb 09 06:30:47.611469 ciro-p51 kernel: nv_procfs_write_suspend+0xe9/0x140 [nvidia]
Feb 09 06:30:47.611484 ciro-p51 kernel: proc_reg_write+0x5a/0x90
Feb 09 06:30:47.611499 ciro-p51 kernel: ? __cond_resched+0x1a/0x50
Feb 09 06:30:47.611517 ciro-p51 kernel: vfs_write+0xc3/0x250
Feb 09 06:30:47.611533 ciro-p51 kernel: ksys_write+0x67/0xe0
Feb 09 06:30:47.611550 ciro-p51 kernel: __x64_sys_write+0x19/0x20
Feb 09 06:30:47.611568 ciro-p51 kernel: do_syscall_64+0x61/0xb0
Feb 09 06:30:47.611597 ciro-p51 kernel: ? exit_to_user_mode_prepare+0x37/0xb0
Feb 09 06:30:47.611615 ciro-p51 kernel: ? syscall_exit_to_user_mode+0x27/0x50
Feb 09 06:30:47.611632 ciro-p51 kernel: ? __x64_sys_newfstatat+0x1c/0x20
Feb 09 06:30:47.611647 ciro-p51 kernel: ? do_syscall_64+0x6e/0xb0
Feb 09 06:30:47.611665 ciro-p51 kernel: ? syscall_exit_to_user_mode+0x27/0x50
Feb 09 06:30:47.611680 ciro-p51 kernel: ? do_syscall_64+0x6e/0xb0
Feb 09 06:30:47.611698 ciro-p51 kernel: ? asm_exc_page_fault+0x8/0x30
Feb 09 06:30:47.611715 ciro-p51 kernel: entry_SYSCALL_64_after_hwframe+0x44/0xae