linuxppc-dev.lists.ozlabs.org archive mirror
 help / color / mirror / Atom feed
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Robert Hancock <hancockr@shaw.ca>,
	linuxppc-dev@ozlabs.org, stable@kernel.org,
	linux-kernel@vger.kernel.org, Olaf Hering <olh@suse.de>
Subject: Re: [PATCH 2.6.22.y] ieee1394: revert "sbp2: enforce 32bit DMA mapping"
Date: Sun, 05 Aug 2007 10:15:26 +1000	[thread overview]
Message-ID: <1186272926.938.8.camel@localhost.localdomain> (raw)
In-Reply-To: <46B4B7C6.1040107@s5r6.in-berlin.de>


> > If setting 32-bit DMA mask fails on ppc64, that sounds like a problem
> > with the DMA implementation on that architecture. There are enough cards
> > out there that only support 32-bit DMA that this really needs to work..
> 
> Yes, could the PPC folks please have a look at it?  Thanks.

Smells like we may have a bug there. No worries though, all current PPC
machines have an iommu that will not give out addresses above 32 bits
anyway, but I'll double check what's up.

Do you see something in dmesg when that happens ?

Ben.

  reply	other threads:[~2007-08-05  0:15 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <fa.Qn3Snqoik3hhnxcA6HqjGV0Yzck@ifi.uio.no>
     [not found] ` <46B4B3DC.7020609@shaw.ca>
2007-08-04 17:30   ` [PATCH 2.6.22.y] ieee1394: revert "sbp2: enforce 32bit DMA mapping" Stefan Richter
2007-08-05  0:15     ` Benjamin Herrenschmidt [this message]
2007-08-05  7:54       ` Stefan Richter
2007-08-05 22:04         ` Benjamin Herrenschmidt
2007-08-06 13:51           ` Olaf Hering
2007-08-06 21:47             ` Benjamin Herrenschmidt
2007-08-06 22:22               ` Stefan Richter
2007-08-06 22:25                 ` Robert Hancock
2007-08-06 22:32                   ` Benjamin Herrenschmidt
2007-08-06 22:35                     ` Robert Hancock
2007-08-06 22:59                       ` Stefan Richter
2007-08-06 22:48                   ` Stefan Richter
2007-08-07  2:18                     ` Andi Kleen
2007-08-06 22:29                 ` Benjamin Herrenschmidt
2007-08-06 11:58         ` Olaf Hering
2007-08-06 21:43           ` Benjamin Herrenschmidt
2007-08-06 22:05             ` [PATCH] powerpc: Fix initialization and usage of dma_mask Benjamin Herrenschmidt
2007-08-06 22:30               ` Olaf Hering

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=1186272926.938.8.camel@localhost.localdomain \
    --to=benh@kernel.crashing.org \
    --cc=hancockr@shaw.ca \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linuxppc-dev@ozlabs.org \
    --cc=olh@suse.de \
    --cc=stable@kernel.org \
    --cc=stefanr@s5r6.in-berlin.de \
    /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).