Re: [PATCH v2] usb: chipidea: local_irq_save/restore added for hw_ep_prime

From: Sebastian Andrzej Siewior
Date: Mon Aug 23 2021 - 12:14:11 EST


On 2021-08-21 16:04:01 [+0900], Jeaho Hwang wrote:
> 2021년 8월 21일 (토) 오후 2:05, Peter Chen <peter.chen@xxxxxxxxxx>님이 작성:
> >
> HI Peter.
>
> We configured the kernel as "low latency desktop" and added
> "threadirqs" inside the cmdline parameter.
> Then udc irq handler runs as a thread and shows no suspicious working.
> I Hope It will help.

May I again point out that since commit
81e2073c175b8 ("genirq: Disable interrupts for force threaded handlers")

the threaded handler runs with disabled interrupts. This time more
verbose. It is available since v5.12-rc4 but it has been also applied
for stable.

> Thanks.

Sebastian