Re: [PATCH v1] block: blk_queue_enter() / __bio_queue_enter() must return -EAGAIN for nowait

[Bart Van Assche <bvanassche@xxxxxxx>]

On 9/12/22 09:53, Stefan Roesch wrote:
> Today blk_queue_enter() and __bio_queue_enter() return -EBUSY for the
> nowait code path. This is not correct: they should return -EAGAIN
> instead.

Why is this considered incorrect? Please explain.

Since this patch also affects other code, e.g. NVMe pass-through, can 
this patch break existing user space code by changing the value returned 
to user space?

Thanks,

Bart.