From: Lonnie Mendez <lmendez19@austin.rr.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] qemu/hw usb-uhci.c
Date: Mon, 24 Apr 2006 19:37:12 -0500 [thread overview]
Message-ID: <444D6F38.3030301@austin.rr.com> (raw)
In-Reply-To: <444D660D.1060604@gmx.de>
nix.wie.weg@gmx.de wrote:
>Hello Fabrice,
>
>This patch introduces an already fixed bug with linux guest os. The
>message is: "controller still running". The attached patch fixes this
>problem.
>
>
To expand on this, I saw windows checking the status register several
times to look for hchalt once R/S bit was written 0. However, Linux
guest hcd only checks the status register once before giving up. So the
much simpler patch here works in both cases. However, it also means we
can't properly indicate when the frame has really stopped and the host
controller halted. This isn't something that shows up with the code in
CVS because the hub is always attached and thus the linux hcd doesn't
try to suspend the bus (Windows XP will do this and there is a patch
I'll try to submit later on this week - very busy).
next prev parent reply other threads:[~2006-04-25 0:37 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-24 21:38 [Qemu-devel] qemu/hw usb-uhci.c Fabrice Bellard
2006-04-24 23:58 ` nix.wie.weg
2006-04-25 0:37 ` Lonnie Mendez [this message]
2006-04-25 21:03 ` Fabrice Bellard
2006-04-25 21:25 ` Johannes Schindelin
-- strict thread matches above, loose matches on Subject: below --
2007-11-11 19:46 Fabrice Bellard
2007-02-22 20:21 Thiemo Seufer
2007-01-17 23:08 Thiemo Seufer
2006-04-25 21:01 Fabrice Bellard
2006-03-11 21:46 Paul Brook
2005-11-19 17:43 Fabrice Bellard
2005-11-05 17:22 Fabrice Bellard
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