From: David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
To: bjorn-yOkvZcmFvRU@public.gmane.org
Cc: netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
me-J2duszcpOy900TDglC2tyg@public.gmane.org,
linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
oliver-GvhC2dPhHPQdnm+yROfE0A@public.gmane.org,
ben.hutchings-4yDnlxn2s6sWdaTGBSpHTA@public.gmane.org
Subject: Re: [PATCH net,stable-4.0] cdc_ncm: Fix tx_bytes statistics
Date: Fri, 22 May 2015 14:34:21 -0400 (EDT) [thread overview]
Message-ID: <20150522.143421.442426385899149301.davem@davemloft.net> (raw)
In-Reply-To: <1432293322-11928-1-git-send-email-bjorn-yOkvZcmFvRU@public.gmane.org>
From: Bjørn Mork <bjorn-yOkvZcmFvRU@public.gmane.org>
Date: Fri, 22 May 2015 13:15:22 +0200
> The tx_curr_frame_payload field is u32. When we try to calculate a
> small negative delta based on it, we end up with a positive integer
> close to 2^32 instead. So the tx_bytes pointer increases by about
> 2^32 for every transmitted frame.
>
> Fix by calculating the delta as a signed long.
>
> Cc: Ben Hutchings <ben.hutchings-4yDnlxn2s6sWdaTGBSpHTA@public.gmane.org>
> Reported-by: Florian Bruhin <me-J2duszcpOy900TDglC2tyg@public.gmane.org>
> Fixes: 7a1e890e2168 ("usbnet: Fix tx_bytes statistic running backward in cdc_ncm")
> Signed-off-by: Bjørn Mork <bjorn-yOkvZcmFvRU@public.gmane.org>
Applied and queued up for -stable.
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next prev parent reply other threads:[~2015-05-22 18:34 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-22 11:15 [PATCH net,stable-4.0] cdc_ncm: Fix tx_bytes statistics Bjørn Mork
2015-05-22 17:22 ` Ben Hutchings
2015-05-22 18:48 ` Bjørn Mork
[not found] ` <1432293322-11928-1-git-send-email-bjorn-yOkvZcmFvRU@public.gmane.org>
2015-05-22 18:34 ` David Miller [this message]
[not found] ` <20150522.143421.442426385899149301.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
2015-05-23 9:27 ` Florian Bruhin
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