Re: [PATCH] gpio: gpiolib-cdev: Fix potential &lr->wait.lock deadlock issue

[YE Chengfeng <cyeaa@xxxxxxxxxxxxxx>]

> Yeah, I'm not sure this is correct. edge_irq_thread() runs in process
> 
> context, so the whole premise of the patch seems to be flawed. What
> tool reported this? Can this be a false positive? Have you seen this
> 
> happen in real life?

It seems like it’s my mistake, I misidentify thread_irq as runing inside
irq context. Then it’s truth that the patch is unnecessary.

The static analysis tool is built by me, I noticed lockdep occasionally reports
such similar deadlocks in other place thus intent to build a static tool to locate
such bugs. It has detected other true bugs these days but it’s a pity this
one is really a false positive.

Indeed thanks so much for your time and sorry for bothering you with the false report.

Thanks again,
Chengfeng