From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Kay Sievers <kay.sievers@vrfy.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>,
pm list <linux-pm@lists.linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
Nigel Cunningham <nigel@nigel.suspend2.net>,
Pavel Machek <pavel@ucw.cz>,
Alan Stern <stern@rowland.harvard.edu>,
Oliver Neukum <oliver@neukum.org>
Subject: Re: [RFC][PATCH -mm 3/3] PM: Disable _request_firmware before hibernation/suspend
Date: Sun, 27 May 2007 23:04:12 +0100 [thread overview]
Message-ID: <20070527220412.GC22687@srcf.ucam.org> (raw)
In-Reply-To: <3ae72650705271449q37f523c3t5980541122ab871@mail.gmail.com>
On Sun, May 27, 2007 at 11:49:30PM +0200, Kay Sievers wrote:
> What exactly is the problem we see here? The timeout of the firmware loader?
> What goes wrong with frozen userspace, usually there is only a netlink
> message sent from the kernel, which should be received and handled
> just fine when userspace is running again.
Driver calls request_firmware in the resume method. The userspace helper
can't be run because it's been frozen, so the firmware never gets loaded
and the call times out. The driver then fails to resume. While all this
is happening, the rest of the kernel is blocking on that resume method.
The firmware can be loaded once userspace has been started again, but by
that time the driver has given up.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2007-05-27 22:04 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-27 20:29 [RFC][PATCH -mm 0/3] PM: Hibernation and suspend notifiers Rafael J. Wysocki
2007-05-27 20:30 ` [RFC][PATCH -mm 1/3] " Rafael J. Wysocki
2007-05-28 9:49 ` Nigel Cunningham
2007-05-28 13:12 ` Pavel Machek
2007-05-28 17:26 ` Rafael J. Wysocki
2007-05-28 15:56 ` Alan Stern
2007-05-28 17:29 ` Rafael J. Wysocki
2007-05-29 22:24 ` Rafael J. Wysocki
2007-05-30 15:37 ` Pavel Machek
2007-05-30 20:44 ` Rafael J. Wysocki
2007-05-30 21:11 ` Rafael J. Wysocki
2007-05-30 22:24 ` Nigel Cunningham
2007-05-31 5:44 ` Rafael J. Wysocki
2007-05-31 14:23 ` Pavel Machek
2007-05-31 20:02 ` Rafael J. Wysocki
2007-05-31 21:56 ` Nigel Cunningham
2007-05-30 22:29 ` Pavel Machek
2007-05-31 5:42 ` Rafael J. Wysocki
2007-05-27 20:30 ` [RFC][PATCH -mm 2/3] PM: Disable usermode helper before hibernation/suspend Rafael J. Wysocki
2007-05-28 13:04 ` Pavel Machek
2007-05-27 20:31 ` [RFC][PATCH -mm 3/3] PM: Disable _request_firmware " Rafael J. Wysocki
2007-05-27 20:45 ` Michael-Luke Jones
2007-05-27 21:55 ` Rafael J. Wysocki
2007-05-28 13:01 ` Pavel Machek
2007-05-29 20:41 ` Rob Landley
2007-05-27 20:49 ` Matthew Garrett
2007-05-27 21:45 ` Rafael J. Wysocki
2007-05-27 22:01 ` Matthew Garrett
2007-05-28 7:44 ` Rafael J. Wysocki
2007-05-28 16:09 ` Alan Stern
2007-05-28 16:12 ` Matthew Garrett
2007-05-28 16:43 ` Alan Stern
2007-05-28 16:54 ` Matthew Garrett
2007-05-28 20:03 ` Alan Stern
2007-05-28 20:57 ` Pavel Machek
2007-05-28 22:29 ` Alan Stern
2007-05-29 20:09 ` [linux-pm] " David Brownell
2007-05-29 20:48 ` Alan Stern
2007-06-04 11:00 ` Pavel Machek
2007-06-05 18:45 ` Alan Stern
2007-06-05 20:26 ` Pavel Machek
2007-05-28 8:30 ` Nigel Cunningham
2007-05-28 11:22 ` Rafael J. Wysocki
2007-05-27 21:49 ` Kay Sievers
2007-05-27 22:01 ` Rafael J. Wysocki
2007-05-27 22:04 ` Matthew Garrett [this message]
2007-05-27 22:16 ` Kay Sievers
2007-05-28 7:43 ` Rafael J. Wysocki
2007-05-28 8:48 ` Michael-Luke Jones
2007-05-28 9:06 ` Kay Sievers
2007-05-28 10:26 ` Michael-Luke Jones
2007-05-28 12:01 ` Kay Sievers
2007-05-28 12:07 ` Michael-Luke Jones
2007-05-28 10:41 ` Michael-Luke Jones
2007-05-29 21:19 ` Rob Landley
2007-05-29 22:51 ` Rob Landley
2007-05-30 19:50 ` Pavel Machek
2007-05-28 11:15 ` Pavel Machek
2007-05-28 11:24 ` Kay Sievers
2007-05-28 11:28 ` Pavel Machek
2007-05-28 11:38 ` Michael-Luke Jones
2007-05-28 11:45 ` [linux-pm] " Pavel Machek
2007-05-28 11:51 ` Kay Sievers
2007-05-28 12:26 ` Michael-Luke Jones
2007-05-28 12:47 ` Kay Sievers
2007-05-28 13:00 ` Pavel Machek
2007-05-28 13:10 ` Michael-Luke Jones
2007-05-28 11:28 ` Rafael J. Wysocki
2007-05-28 13:07 ` Pavel Machek
2007-05-28 15:55 ` Alan Stern
2007-05-28 17:43 ` Rafael J. Wysocki
2007-05-28 20:51 ` Ray Lee
2007-05-28 20:59 ` Pavel Machek
2007-06-02 0:41 ` [RFC][PATCH -mm 0/2] PM: Hibernation and suspend notifiers (rev. 2) Rafael J. Wysocki
2007-06-02 0:43 ` [RFC][PATCH -mm 1/2] PM: Introduce hibernation and suspend notifiers Rafael J. Wysocki
2007-06-03 16:41 ` Pavel Machek
2007-06-03 22:38 ` Rafael J. Wysocki
2007-06-03 22:59 ` Pavel Machek
2007-06-04 7:56 ` Rafael J. Wysocki
2007-06-02 0:44 ` [RFC][PATCH -mm 2/2] PM: Disable usermode helper before hibernation and suspend Rafael J. Wysocki
2007-06-03 16:42 ` Pavel Machek
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