Re: [PATCH] devcoredump: Fix circular locking dependency with devcd->mutex.

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Mon, Oct 06, 2025 at 11:11:01AM +0200, Maarten Lankhorst wrote:
> >> @@ -401,13 +424,20 @@ void dev_coredumpm_timeout(struct device *dev, struct module *owner,
> >>  
> >>  	dev_set_uevent_suppress(&devcd->devcd_dev, false);
> >>  	kobject_uevent(&devcd->devcd_dev.kobj, KOBJ_ADD);
> >> -	INIT_DELAYED_WORK(&devcd->del_wk, devcd_del);
> >> -	schedule_delayed_work(&devcd->del_wk, timeout);
> >> +
> >> +	/*
> >> +	 * Safe to run devcd_del() now that we are done with devcd_dev.
> >> +	 * Alternatively we could have taken a ref on devcd_dev before
> >> +	 * dropping the lock.
> >> +	 */
> >> +	devcd->init_completed = true;
> >>  	mutex_unlock(&devcd->mutex);
> >>  	return;
> >>   put_device:
> >> -	put_device(&devcd->devcd_dev);
> >>  	mutex_unlock(&devcd->mutex);
> >> +	cancel_delayed_work_sync(&devcd->del_wk);
> >> +	put_device(&devcd->devcd_dev);
> >> +
> > 
> > Acked-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
> 
> Thanks, through what tree can this be merged?

I can look into doing that after -rc1 is out.

thanks,

greg k-h