From: Oliver Neukum <oliver@neukum.org>
To: Felipe Balbi <me@felipebalbi.com>
Cc: Markus Rechberger <mrechberger@gmail.com>,
Mark Lord <lkml@rtr.ca>,
linux-kernel@vger.kernel.org,
linux-usb-devel@lists.sourceforge.net,
Laurent Pinchart <laurentp@cse-semaphore.com>
Subject: Re: USB deadlock after resume
Date: Wed, 21 Nov 2007 16:10:58 +0100 [thread overview]
Message-ID: <200711211610.58684.oliver@neukum.org> (raw)
In-Reply-To: <dd6afcb038a38716f46887681f05f367@felipebalbi.com>
Am Mittwoch 21 November 2007 schrieb Felipe Balbi:
> > Do you know any good way for performing a softreset within the driver?
> > The video application should get a continuous datastream after
> > resuming the notebook, so the driver shouldn't be unloaded.
> > The driver also keeps a list of previous camera settings which should
> > be set up again after resuming. Stopping the video application and
> > reattaching the device using ACPI (this board supports reconnecting
> > the device using ACPI) should be avoided.
>
> When you suspend, you cut off vbus (afaik, correct me if I'm wrong), which
> means your device will get disconnected. One way to avoid this is enabling
> CONFIG_USB_PERSIST and trying with that on.
Suspend may or may not cut off power. If it does cut off power, resume() will
never be called, instead either disconnect() or reset_resume().
Regards
Oliver
next prev parent reply other threads:[~2007-11-21 15:11 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-20 21:47 Markus Rechberger
2007-11-21 4:17 ` Mark Lord
2007-11-21 5:32 ` Markus Rechberger
2007-11-21 10:59 ` Markus Rechberger
2007-11-21 11:46 ` Oliver Neukum
2007-11-21 14:37 ` Markus Rechberger
2007-11-21 14:42 ` Markus Rechberger
2007-11-21 14:52 ` Markus Rechberger
2007-11-21 15:00 ` Felipe Balbi
2007-11-21 14:58 ` Felipe Balbi
2007-11-21 15:10 ` Oliver Neukum [this message]
2007-11-21 20:52 ` [linux-usb-devel] " Laurent Pinchart
2007-11-21 21:55 ` Alan Stern
2007-11-21 14:52 ` Felipe Balbi
2007-11-21 15:03 ` Oliver Neukum
2007-11-21 15:15 ` Oliver Neukum
2007-11-21 15:25 ` Markus Rechberger
2007-11-21 20:41 ` [linux-usb-devel] " Laurent Pinchart
2007-11-22 11:52 ` Oliver Neukum
2007-11-21 16:31 ` Alan Stern
2007-11-21 17:14 ` Markus Rechberger
2007-11-21 18:02 ` Alan Stern
2007-11-21 20:45 ` Laurent Pinchart
2007-11-21 22:22 ` Markus Rechberger
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=200711211610.58684.oliver@neukum.org \
--to=oliver@neukum.org \
--cc=laurentp@cse-semaphore.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb-devel@lists.sourceforge.net \
--cc=lkml@rtr.ca \
--cc=me@felipebalbi.com \
--cc=mrechberger@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
Powered by JetHome