From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: IrDA driver fails on PXA255
Date: Sun, 29 May 2011 00:46:14 +0100 [thread overview]
Message-ID: <20110528234614.GV24876@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <alpine.DEB.2.00.1105281628480.9934@chino.kir.corp.google.com>
On Sat, May 28, 2011 at 04:34:07PM -0700, David Rientjes wrote:
> The driver is attempting to allocate DMA memory and you have
> CONFIG_ZONE_DMA disabled, which is the only reason you would get this
> warning. If the allocation did not fail as a result of a197b59ae6e8, the
> page allocator may return any memory in a higher zone that the driver may
> not be expecting. If you had never noticed a problem before, it may be
> possible that the driver doesn't actually have any zone restrictions and
> GFP_DMA can be removed, but this code is pretty old. Otherwise, it'll
> need to depend on ZONE_DMA in the Kconfig.
>
> Let's cc Nicolas and Russell as well.
Ouch. We're probably going to have a pile of work to do to check that
the DMA masks on all our devices are correct for the unrestricted case
then. That's probably going to be a very _big_ patch.
next prev parent reply other threads:[~2011-05-28 23:46 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-28 20:57 IrDA driver fails on PXA255 Dmitry Eremin-Solenikov
2011-05-28 23:34 ` David Rientjes
2011-05-28 23:46 ` Russell King - ARM Linux [this message]
2011-05-29 2:22 ` David Rientjes
2011-05-29 7:25 ` Russell King - ARM Linux
2011-05-29 21:19 ` David Rientjes
2011-05-29 21:58 ` Russell King - ARM Linux
2011-05-31 5:01 ` David Rientjes
2011-05-29 8:36 ` Dmitry Eremin-Solenikov
2011-05-29 21:17 ` David Rientjes
2011-05-29 21:33 ` Dmitry Eremin-Solenikov
2011-05-29 21:56 ` Russell King - ARM Linux
2011-05-31 5:05 ` David Rientjes
2011-05-31 7:26 ` Russell King - ARM Linux
2011-05-31 20:03 ` David Rientjes
2011-05-31 21:00 ` Russell King - ARM Linux
2011-05-31 22:11 ` David Rientjes
2011-06-01 7:54 ` Russell King - ARM Linux
2011-06-01 15:50 ` Russell King - ARM Linux
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=20110528234614.GV24876@n2100.arm.linux.org.uk \
--to=linux@arm.linux.org.uk \
--cc=linux-arm-kernel@lists.infradead.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;
as well as URLs for NNTP newsgroup(s).