From: Oliver Neukum <oneukum@suse.de>
To: Daniel Kurtz <djkurtz@chromium.org>
Cc: jkosina@suse.cz, bleung@chromium.org, stern@rowland.harvard.edu,
olofj@chromium.org, linux-input@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org
Subject: Re: [PATCH 3/3] HID: usbhid: defer LED setting to a workqueue
Date: Wed, 14 Dec 2011 12:22:40 +0100 [thread overview]
Message-ID: <201112141222.41006.oneukum@suse.de> (raw)
In-Reply-To: <CAGS+omA=9qfqDYtaLp67Xz+WhcpW_=jn9hoiaad43Z+oexjsFQ@mail.gmail.com>
Am Mittwoch, 14. Dezember 2011, 11:33:03 schrieb Daniel Kurtz:
> On Wed, Dec 14, 2011 at 4:01 PM, Oliver Neukum <oneukum@suse.de> wrote:
> > Am Donnerstag, 17. November 2011, 12:23:50 schrieb Daniel Kurtz:
> >> Defer LED setting action to a workqueue.
> >> This is more likely to send all LED change events in a single URB.
> >
> > Hi,
> >
> > I hope I am looking at the correct version of this patch.
> > But as far as I can see the work for handling LEDs is not delayed
> > while a reset is going on. That is wrong.
>
> Actually, I'm not sure why this is wrong. I find the reset handling
> quite confusing in this driver.
> Can you point out what will fail, and recommend how to fix it?
That is part of the workings of a USB driver. After you return from
pre_reset() you don't do IO to the device. After post_reset() the
device should be in its default state whose LED states won't match
what they ought to be.
Regards
Oliver
next prev parent reply other threads:[~2011-12-14 11:21 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-17 11:23 [PATCH 0/3 v2] usb/hid-core: drain URB queue when going to suspend Daniel Kurtz
2011-11-17 11:23 ` [PATCH 1/3] HID: usbhid: remove LED_ON Daniel Kurtz
2011-11-17 11:23 ` [PATCH 2/3] HID: usbhid: hid-core: submit queued urbs before suspend Daniel Kurtz
2011-12-14 7:55 ` Oliver Neukum
2011-12-14 8:00 ` Daniel Kurtz
2011-12-14 9:14 ` Oliver Neukum
2011-12-14 9:41 ` Daniel Kurtz
2011-12-14 11:36 ` Oliver Neukum
2011-11-17 11:23 ` [PATCH 3/3] HID: usbhid: defer LED setting to a workqueue Daniel Kurtz
2011-12-14 8:01 ` Oliver Neukum
2011-12-14 8:19 ` Daniel Kurtz
2011-12-14 9:25 ` Oliver Neukum
2011-12-14 10:33 ` Daniel Kurtz
2011-12-14 11:22 ` Oliver Neukum [this message]
2011-12-15 6:43 ` Daniel Kurtz
2011-12-15 9:01 ` Oliver Neukum
2011-12-20 10:12 ` Daniel Kurtz
2011-12-20 10:18 ` Oliver Neukum
2011-12-21 10:19 ` Jiri Kosina
2011-12-07 2:42 ` [PATCH 0/3 v2] usb/hid-core: drain URB queue when going to suspend Daniel Kurtz
2011-12-07 9:27 ` Jiri Kosina
-- strict thread matches above, loose matches on Subject: below --
2011-11-01 9:25 [PATCH 0/3] " Daniel Kurtz
2011-11-01 9:25 ` [PATCH 3/3] HID: usbhid: defer LED setting to a workqueue Daniel Kurtz
2011-11-07 14:48 ` Oliver Neukum
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