From: Pierre Ossman <drzeus-list@drzeus.cx>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: ISA DMA controller hangs
Date: Sun, 05 Jun 2005 16:03:08 +0200 [thread overview]
Message-ID: <42A3061C.7010604@drzeus.cx> (raw)
In-Reply-To: <42A2B610.1020408@drzeus.cx>
Pierre Ossman wrote:
>
> I added some debug output to the driver, dumping the DMA controller's
> registers before and after suspend and it seems it goes completely
> apeshit. The registers are filled with, what it seems, random data. The
> reason it stops working seems to be that channel 4 gets disabled killing
> the cascaded channels. I'm going to try and confirm this today.
>
Confirmed. By explicitly reenabling DMA channel 4 in the driver on
resumt the DMA transfers work fine.
next prev parent reply other threads:[~2005-06-05 14:03 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-28 13:38 ISA DMA controller hangs Pierre Ossman
2005-05-28 13:51 ` Alan Cox
2005-06-05 8:21 ` Pierre Ossman
2005-06-05 14:03 ` Pierre Ossman [this message]
2005-06-16 15:53 ` Pierre Ossman
2005-06-16 16:06 ` Russell King
2005-06-18 8:15 ` Pierre Ossman
2005-06-19 15:45 ` Russell King
2005-06-30 8:00 ` Pierre Ossman
2005-06-30 11:28 ` Alan Cox
2005-06-30 12:20 ` Pierre Ossman
2005-06-30 17:55 ` [PATCH 1/2] ISA DMA suspend for i386 Pierre Ossman
2005-06-30 17:58 ` [PATCH 2/2] ISA DMA suspend for x86_64 Pierre Ossman
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=42A3061C.7010604@drzeus.cx \
--to=drzeus-list@drzeus.cx \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=linux-kernel@vger.kernel.org \
/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