From: David Miller <davem@davemloft.net>
To: ard.biesheuvel@linaro.org
Cc: romieu@fr.zoreil.com, nic_swsd@realtek.com,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] r8169: set coherent DMA mask as well as streaming DMA mask
Date: Sat, 15 Oct 2016 17:29:49 -0400 (EDT) [thread overview]
Message-ID: <20161015.172949.326250924585943753.davem@davemloft.net> (raw)
In-Reply-To: <1476452433-20518-1-git-send-email-ard.biesheuvel@linaro.org>
From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Date: Fri, 14 Oct 2016 14:40:33 +0100
> PCI devices that are 64-bit DMA capable should set the coherent
> DMA mask as well as the streaming DMA mask. On some architectures,
> these are managed separately, and so the coherent DMA mask will be
> left at its default value of 32 if it is not set explicitly. This
> results in errors such as
>
> r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
> hwdev DMA mask = 0x00000000ffffffff, dev_addr = 0x00000080fbfff000
> swiotlb: coherent allocation failed for device 0000:02:00.0 size=4096
> CPU: 0 PID: 1062 Comm: systemd-udevd Not tainted 4.8.0+ #35
> Hardware name: AMD Seattle/Seattle, BIOS 10:53:24 Oct 13 2016
>
> on systems without memory that is 32-bit addressable by PCI devices.
>
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Applied.
prev parent reply other threads:[~2016-10-15 21:29 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-14 13:40 [PATCH v2] r8169: set coherent DMA mask as well as streaming DMA mask Ard Biesheuvel
2016-10-14 13:42 ` David Laight
2016-10-14 13:46 ` Ard Biesheuvel
2016-10-14 13:48 ` Ard Biesheuvel
2016-10-15 21:31 ` David Miller
2016-10-14 20:48 ` Francois Romieu
2016-10-15 21:29 ` David Miller [this message]
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=20161015.172949.326250924585943753.davem@davemloft.net \
--to=davem@davemloft.net \
--cc=ard.biesheuvel@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=nic_swsd@realtek.com \
--cc=romieu@fr.zoreil.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;
as well as URLs for NNTP newsgroup(s).