From: David Brownell <david-b@pacbell.net>
To: Paul Mackerras <paulus@samba.org>
Cc: Linus Torvalds <torvalds@osdl.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Linux Kernel list <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>, Pavel Machek <pavel@ucw.cz>
Subject: Re: Totally broken PCI PM calls
Date: Mon, 11 Oct 2004 09:47:38 -0700 [thread overview]
Message-ID: <200410110947.38730.david-b@pacbell.net> (raw)
In-Reply-To: <16746.2820.352047.970214@cargo.ozlabs.ibm.com>
On Sunday 10 October 2004 9:24 pm, Paul Mackerras wrote:
> Linus Torvalds writes:
>
> > And they are unbroken again (well, at least they work for me again).
> > Partly by the PM_ renumbering under discussion.
>
> Interesting. I find that with suspend-to-ram, USB keyboards don't
> work after resume, and that the system will hang on resume if you
> remove a USB device during sleep.
A "hang" sounds like the pmcore bug I reported about a year ago...
It's rather foolish of the PM core to use the same semaphore to
protect system-wide suspend/resume operations that it uses to
for mutual exclusion on the device add/remove (which suspend
and resume callbacks did happily in 2.4) ... since it's routine to
unplug peripherals on suspended systems!
Alternatively, if you're combininging USB_SUSPEND with any
system-wide suspend operation, you're asking for trouble;
the PM core is just not ready for that. (In fact I've wondered
if maybe 2.6.9 shouldn't discourage that combination more
actively...)
But a keyboard-specific issue might be improved with the
HID patch I posted last week, teaching that driver how to
handle suspend() and resume() callbacks.
- Dave
next prev parent reply other threads:[~2004-10-11 17:04 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-11 0:45 Totally broken PCI PM calls Benjamin Herrenschmidt
2004-10-11 2:41 ` Linus Torvalds
2004-10-11 3:42 ` Paul Mackerras
2004-10-11 4:04 ` Linus Torvalds
2004-10-11 4:24 ` Paul Mackerras
2004-10-11 9:57 ` Pavel Machek
2004-10-11 14:42 ` Linus Torvalds
2004-10-11 14:56 ` suspend-to-RAM [was Re: Totally broken PCI PM calls] Pavel Machek
2004-10-11 15:30 ` Linus Torvalds
2004-10-11 17:39 ` Olivier Galibert
2004-10-11 18:21 ` Pavel Machek
2004-10-11 15:53 ` Brice Goglin
2004-10-11 16:17 ` Pavel Machek
2004-10-11 17:09 ` Brice Goglin
2004-10-11 18:23 ` Pavel Machek
2004-10-11 18:40 ` Brice Goglin
2004-10-11 16:47 ` David Brownell [this message]
2004-10-11 22:28 ` Totally broken PCI PM calls Benjamin Herrenschmidt
2004-10-11 22:58 ` Dmitry Torokhov
2004-10-11 23:08 ` Benjamin Herrenschmidt
2004-10-12 3:00 ` David Brownell
2004-10-12 4:09 ` Dmitry Torokhov
2004-10-12 16:56 ` David Brownell
2004-10-12 9:27 ` Russell King
2004-10-12 11:24 ` Benjamin Herrenschmidt
2004-10-11 4:25 ` Linus Torvalds
2004-10-11 10:18 ` Pavel Machek
2004-10-11 10:54 ` Benjamin Herrenschmidt
2004-10-11 16:01 ` Linus Torvalds
2004-10-15 13:59 ` Pavel Machek
2004-10-15 15:56 ` Linus Torvalds
2004-10-24 20:58 ` Pavel Machek
2004-10-24 21:18 ` Linus Torvalds
2004-10-11 16:36 ` David Brownell
2004-10-11 21:17 ` Nigel Cunningham
2004-10-11 21:37 ` David Brownell
2004-10-11 22:12 ` Stefan Seyfried
2004-10-12 2:59 ` David Brownell
2004-10-12 8:54 ` Pavel Machek
2004-10-12 10:32 ` Stefan Seyfried
2004-10-12 18:28 ` David Brownell
2004-10-12 20:28 ` Stefan Seyfried
2004-10-13 13:34 ` David Brownell
2004-10-12 1:24 ` Nigel Cunningham
2004-10-12 8:53 ` Pavel Machek
2004-10-12 18:52 ` David Brownell
2004-10-12 19:50 ` Pavel Machek
2004-10-12 22:13 ` Benjamin Herrenschmidt
2004-10-12 22:35 ` David Brownell
2004-10-11 22:26 ` Benjamin Herrenschmidt
2004-10-11 3:45 ` Benjamin Herrenschmidt
2004-10-11 4:08 ` Linus Torvalds
2004-10-11 4:23 ` Benjamin Herrenschmidt
2004-10-11 4:32 ` Linus Torvalds
2004-10-11 4:55 ` Benjamin Herrenschmidt
2004-10-11 16:15 ` David Brownell
2004-10-11 22:22 ` Benjamin Herrenschmidt
2004-10-12 2:46 ` David Brownell
2004-10-12 4:02 ` Benjamin Herrenschmidt
2004-10-12 10:49 ` Nigel Cunningham
2004-10-12 11:27 ` Benjamin Herrenschmidt
2004-10-12 11:38 ` Nigel Cunningham
2004-10-12 11:51 ` Pavel Machek
2004-10-11 10:08 ` Pavel Machek
2004-10-11 9:51 ` Pavel Machek
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