From: David Miller <davem@davemloft.net>
To: david-b@pacbell.net
Cc: greg@kroah.com, linux-usb-users@lists.sourceforge.net,
linux-kernel@vger.kernel.org
Subject: Re: OHCI root_port_reset() deadly loop...
Date: Mon, 08 Oct 2007 22:23:58 -0700 (PDT) [thread overview]
Message-ID: <20071008.222358.133742279.davem@davemloft.net> (raw)
In-Reply-To: <20071009050019.C6C6023718A@adsl-69-226-248-13.dsl.pltn13.pacbell.net>
From: David Brownell <david-b@pacbell.net>
Date: Mon, 08 Oct 2007 22:00:19 -0700
> Assuming PCI is present, /sys/bus/pci/devices/*/class can tell
> if EHCI is present (0x0c0320) ... if so, load that driver.
> Then repeat for OHCI (0x0c0310) and UHCI (0x0c0300).
These are facts all of us know very well, but implementing this in
userspace in a failsafe manner isn't practical. That's what we're
discussing.
There are things that autoload USB drivers way before udev or similar
even get started.
For example, the first thing some distributions do is try to load the
correct keyboard maps. Guess what that can do? It triggers a load of
all of the modular USB host controller drivers in case we have a USB
keyboard.
The only real solution is in the kernel, because it is the only
clean place to trap all of the potential module load events.
next prev parent reply other threads:[~2007-10-09 5:24 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-07 6:53 OHCI root_port_reset() deadly loop David Miller
2007-10-07 7:31 ` David Brownell
2007-10-07 7:51 ` David Miller
2007-10-08 23:54 ` David Miller
2007-10-09 3:10 ` Greg KH
2007-10-09 3:16 ` David Miller
2007-10-09 3:34 ` David Brownell
2007-10-09 3:42 ` David Miller
2007-10-09 4:39 ` Greg KH
2007-10-09 4:47 ` David Miller
2007-10-09 5:11 ` Benjamin Herrenschmidt
2007-10-09 6:06 ` Greg KH
2007-10-09 19:22 ` [linux-usb-devel] " David Brownell
2007-10-10 15:32 ` Alan Stern
2007-10-09 5:00 ` David Brownell
2007-10-09 5:23 ` David Miller [this message]
2007-10-09 6:43 ` Benjamin Herrenschmidt
2007-10-09 18:48 ` David Brownell
2007-10-09 16:01 ` [Linux-usb-users] " Alan Stern
2007-10-09 17:39 ` Greg KH
2007-10-09 18:42 ` Alan Stern
2007-10-09 18:59 ` David Brownell
2007-10-09 21:27 ` David Miller
2007-10-09 21:43 ` David Brownell
2007-10-09 22:00 ` David Miller
2007-10-10 4:35 ` David Miller
2007-10-15 22:01 ` David Miller
2007-10-15 23:39 ` David Brownell
2007-10-15 23:58 ` David Miller
2007-10-16 15:23 ` Alan Stern
2007-10-16 22:06 ` David Miller
2007-10-16 22:20 ` Greg KH
2007-10-17 15:56 ` Alan Stern
2007-10-16 22:08 ` David Miller
2007-10-17 15:51 ` Alan Stern
2007-10-17 23:03 ` David Miller
2007-10-18 14:28 ` Alan Stern
2007-10-16 18:26 ` David Brownell
2007-10-09 4:09 ` David Brownell
2007-10-09 5:13 ` Benjamin Herrenschmidt
2007-10-09 5:26 ` David Miller
2007-10-09 6:37 ` Benjamin Herrenschmidt
2007-10-09 4:36 ` David Brownell
2007-10-09 4:44 ` David Miller
2007-10-09 16:38 ` David Brownell
2007-10-09 20:41 ` David Miller
2007-10-09 20:46 ` Greg KH
2007-10-09 21:05 ` David Brownell
2007-10-09 21:09 ` David Brownell
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=20071008.222358.133742279.davem@davemloft.net \
--to=davem@davemloft.net \
--cc=david-b@pacbell.net \
--cc=greg@kroah.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb-users@lists.sourceforge.net \
/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