linux-kernel - Re: [PATCH] usb: avoid PM error messages during resume if a device was disconnected

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]

Message-Id: <200903232230.19330.elendil@planet.nl>
Date:	Mon, 23 Mar 2009 22:30:18 +0100
From:	Frans Pop <elendil@...net.nl>
To:	linux-usb@...r.kernel.org
Cc:	Alan Stern <stern@...land.harvard.edu>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	linux-pm@...ts.linux-foundation.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] usb: avoid PM error messages during resume if a device was disconnected

On Monday 23 March 2009, Frans Pop wrote:
> Currently if a laptop is suspended e.g. while docked and then resumed
> after undocking it, the following errors get generated because the USB
> hub in the docking station and the devices connected to it are no
> longer available:
> pm_op(): usb_dev_resume+0x0/0x10 returns -19 
> PM: Device 1-2 failed to resume: error -19
> pm_op(): usb_dev_resume+0x0/0x10 returns -19
> PM: Device 1-2.2 failed to resume: error -19
> pm_op(): usb_dev_resume+0x0/0x10 returns -19
> PM: Device 1-2.3 failed to resume: error -19
>
> As the removal of USB devices while a system is suspended is a
> relatively common use case and in most cases not an error, just return
> success on -ENODEV. The user gets informed anyway as the USB subsystem
> generates regular disconnect messages for the devices shortly
> afterwards:
> usb 1-2: USB disconnect, address 3 
> usb 1-2.2: USB disconnect, address 4
> usblp0: removed
> usb 1-2.3: USB disconnect, address 5
>
> Signed-off-by: Frans Pop <elendil@...net.nl>
> Cc: Alan Stern <stern@...land.harvard.edu>
> Cc: Rafael J. Wysocki <rjw@...k.pl>

Forgot to mention that the patch is intended on top of Rafael's "Rework 
disabling of interrupts during suspend-resume" series.
--
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/