From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Pete Zaitcev <zaitcev@redhat.com>
Cc: Aleksey Gorelov <Aleksey_Gorelov@Phoenix.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-usb-devel@lists.sourceforge.net
Subject: Re: [linux-usb-devel] USB shared interrupt problem
Date: Sat, 07 Aug 2004 23:21:41 +0100 [thread overview]
Message-ID: <1091917299.19077.34.camel@localhost.localdomain> (raw)
In-Reply-To: <20040806134230.5b05bca0@lembas.zaitcev.lan>
On Gwe, 2004-08-06 at 21:42, Pete Zaitcev wrote:
> I have a patch which prevents SMM BIOS from doing this to us
> by requesting unconditional handoff (it comes from Vojtech @SuSE,
> modified by John Stulz from IBM for 2.4). However, if you have a "normal"
> BIOS doing this, I'm a little lost as to what to do. It can still honor
> the handoff, if you're lucky.
In SMM mode the USB controller isn't connected to the PCI IRQ line. That
is one thing that is done in the changeover. It also seems to be causing
problems with EHCI hand over on NVidia boards still.
BTW the patch wants extending by someone to cover EHCI - modern boards
are doing EHCI USB legacy now.
Alan
next prev parent reply other threads:[~2004-08-07 23:25 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-05 22:03 Aleksey Gorelov
2004-08-06 20:42 ` [linux-usb-devel] " Pete Zaitcev
2004-08-07 22:21 ` Alan Cox [this message]
2004-08-10 1:54 Aleksey Gorelov
2004-08-12 2:00 Aleksey Gorelov
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=1091917299.19077.34.camel@localhost.localdomain \
--to=alan@lxorguk.ukuu.org.uk \
--cc=Aleksey_Gorelov@Phoenix.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb-devel@lists.sourceforge.net \
--cc=zaitcev@redhat.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
all inboxes | Powered by JetHome®