Re: locking problems in iwlwifi? was Re: 6.16-rcX: crashing way too often on thinkpad X220

[Waiman Long]

On 7/24/25 6:21 PM, Thomas Gleixner wrote:
> On Thu, Jul 24 2025 at 15:22, Waiman Long wrote:
> > On 7/24/25 3:07 PM, Pavel Machek wrote:
> > > > The lockdep warning just means that console_owner_lock is acquired both in
> > > > softirq context and in task context with interrupt enabled. That can leads
> > > > to deadlock. So the remedy is to always take console_owner_lock with
> > > > interrupt disabled, i.e. with
> > > > raw_spin_lock_irqsave/raw_spin_lock_irqrestore.
> > > So you suspect problem is in the printk code?
> > This lockdep problem is likely unrelated to the IRQ flag problem
> > reported in the original email as it shouldn't affect the IRQ flag.
> Wrong you are ... :)
Sorry for coming to a conclusion early without looking more deeply into 
the printk code. I do admit that printk() isn't an area that I know 
enough about.

Will look harder next time.

Thanks,
Longman