linux-kernel - Re: [PATCH 1/4] PM: Introduce destroy_suspended

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 4 Jan 2008 22:11:15 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
cc:	pm list <linux-pm@...ts.linux-foundation.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Len Brown <lenb@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Pavel Machek <pavel@...e.cz>, Ingo Molnar <mingo@...e.hu>,
	Greg KH <gregkh@...e.de>
Subject: Re: [PATCH 1/4] PM: Introduce destroy_suspended_device()

On Fri, 4 Jan 2008, Rafael J. Wysocki wrote:

> I have rebased gregkh-driver-pm-acquire-device-locks-prior-to-suspending.patch
> on top of the $subject series, the result is appended.  It has only been
> compilation tested for now, but I'll be testing it for the next couple of days.
> 
> Please review.

I would prefer it if you could also merge in this patch at the same 
time:

https://lists.linux-foundation.org/pipermail/linux-pm/2007-December/015921.html

> +void device_resume(void)
>  {
> -	sysdev_resume();
> -	dpm_power_up();
> +	might_sleep();
> +	dpm_resume();
> +	unlock_all_devices();
> +	unregister_dropped_devices();
> +	up_write(&pm_sleep_rwsem);
>  }

With the aforementioned patch merged in, this will generate a 
warning for each dropped device.  The call to 
unregister_dropped_devices() should come after the up_write().

You might also consider adding a call to unregister_dropped_devices()  
in the error path of device_suspend() -- in theory even an aborted 
suspend might cause a device to malfunction.

Otherwise this looks okay.

Alan Stern

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/