From: Andy Green <andy-/Zus8d0mwwtBDgjK7y7TUQ@public.gmane.org>
To: Roger Quadros <roger.quadros-xNZwKgViW5gAvxtiuMwx3w@public.gmane.org>
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
patches-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org
Subject: Re: [RFC PATCH 2/5] OMAP2+: add cpu id register to MAC address helper
Date: Fri, 18 Mar 2011 09:13:04 +0000 [thread overview]
Message-ID: <4D832220.9030704@linaro.org> (raw)
In-Reply-To: <4D831D4B.8090407-xNZwKgViW5gAvxtiuMwx3w@public.gmane.org>
On 03/18/2011 08:52 AM, Somebody in the thread at some point said:
>> + /* mark it as not multicast and outside official 80211 MAC namespace */
>> +
>> + mac[0] = (mac[0]& ~1) | 2;
> so here lies the answer to my question "From where do you get the MAC" :)
>
> Is there a guarantee that this MAC will work in all Ethernet setups?
Yeah it's in 80211 spec. You have to buy the spec, I can't point you to
it directly, but here is the wikipedia article showing the structure
http://en.wikipedia.org/wiki/MAC_address#Address_details
the random mac addresses generated by the kernel also use this scheme.
-Andy
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2011-03-18 9:13 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-12 22:50 [RFC PATCH 0/5] OMAP2+ / Panda implementation for async platform_data Andy Green
2011-03-12 22:50 ` [RFC PATCH 1/5] OMAP2+: Panda introduce async platform data definition Andy Green
2011-03-13 1:05 ` Greg KH
2011-03-12 22:50 ` [RFC PATCH 2/5] OMAP2+: add cpu id register to MAC address helper Andy Green
2011-03-18 8:34 ` Arnd Bergmann
2011-03-18 8:49 ` Andy Green
2011-03-18 14:37 ` Premi, Sanjeev
[not found] ` <B85A65D85D7EB246BE421B3FB0FBB593024C3B8670-/tLxBxkBPtCIQmiDNMet8wC/G2K4zDHf@public.gmane.org>
2011-03-18 14:47 ` Andy Green
[not found] ` <20110312225047.27728.1835.stgit-MbR9/eEqKADKkTgpAXvmkg@public.gmane.org>
2011-03-18 8:52 ` Roger Quadros
[not found] ` <4D831D4B.8090407-xNZwKgViW5gAvxtiuMwx3w@public.gmane.org>
2011-03-18 9:13 ` Andy Green [this message]
2011-03-12 22:50 ` [RFC PATCH 3/5] OMAP2+:Common CPU DIE ID reading code reads wrong registers for OMAP4430 Andy Green
2011-03-14 18:12 ` Tony Lindgren
2011-03-12 22:51 ` [RFC PATCH 4/5] OMAP2+: Set onboard Ethernet MAC address using unique CPU ID data Andy Green
[not found] ` <20110312224440.27728.60593.stgit-MbR9/eEqKADKkTgpAXvmkg@public.gmane.org>
2011-03-12 22:51 ` [RFC PATCH 5/5] USBNET: SMSC95XX: if mac set in platform data no need for random one Andy Green
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=4D832220.9030704@linaro.org \
--to=andy-/zus8d0mwwtbdgjk7y7tuq@public.gmane.org \
--cc=andy.green-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org \
--cc=linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=patches-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org \
--cc=roger.quadros-xNZwKgViW5gAvxtiuMwx3w@public.gmane.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).