linux-kernel - Re: [PATCH] Revert "usb: core: remove local_irq

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Date:   Sat, 1 Jun 2019 13:02:47 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Soeren Moch <smoch@....de>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Stern <stern@...land.harvard.edu>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH] Revert "usb: core: remove local_irq_save() around
 ->complete() handler"

On 2019-06-01 12:50:08 [+0200], To Soeren Moch wrote:
> I will look into this. 

nothing obvious. If there is really blocken lock, could you please
enable lockdep
|CONFIG_LOCK_DEBUGGING_SUPPORT=y
|CONFIG_PROVE_LOCKING=y
|# CONFIG_LOCK_STAT is not set
|CONFIG_DEBUG_RT_MUTEXES=y
|CONFIG_DEBUG_SPINLOCK=y
|CONFIG_DEBUG_MUTEXES=y
|CONFIG_DEBUG_WW_MUTEX_SLOWPATH=y
|CONFIG_DEBUG_RWSEMS=y
|CONFIG_DEBUG_LOCK_ALLOC=y
|CONFIG_LOCKDEP=y
|# CONFIG_DEBUG_LOCKDEP is not set
|CONFIG_DEBUG_ATOMIC_SLEEP=y

and send me the splat that lockdep will report?

> > Thanks,
> > Soeren

Sebastian