From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: Wenzhuo Lu <wenzhuo.lu@intel.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] e1000: fix the issue of wrongly reporting descriptor done
Date: Sun, 02 Aug 2015 23:55:10 +0200 [thread overview]
Message-ID: <1715977.YirRIvxXYr@xps13> (raw)
In-Reply-To: <1438223940-12582-1-git-send-email-wenzhuo.lu@intel.com>
2015-07-30 10:39, Wenzhuo Lu:
> Header buffer address for header split will be filled with the physical
> address for DMA, which is actually not needed at all, as header split
> hasn't been supported. Hardware requires the least bit of header address
> which is 'Descriptor Done' bit when write back should be set to 0 by driver.
> The issue is that if the user wants to reserve an odd number of bytes between
> the mbuf header and data buffer, the physical address to be filled in the
> descriptor would happen to be odd. That means the DD bit would be set to
> non-zero by driver. That will result in reporting descriptor done wrongly.
>
> Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
Applied, thanks
prev parent reply other threads:[~2015-08-02 21:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-30 2:39 Wenzhuo Lu
2015-08-02 21:55 ` Thomas Monjalon [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=1715977.YirRIvxXYr@xps13 \
--to=thomas.monjalon@6wind.com \
--cc=dev@dpdk.org \
--cc=wenzhuo.lu@intel.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).