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Date:   Sun, 5 Mar 2017 09:43:47 +0000
From:   "Mintz, Yuval" <>
To:     Michal Schmidt <>,
        "" <>
CC:     "Elior, Ariel" <>
Subject: RE: [PATCH net 1/7] bnx2x: prevent crash when accessing PTP with
 interface down

> It is possible to crash the kernel by accessing a PTP device while its
> associated bnx2x interface is down. Before the interface is brought up, the
> timecounter is not initialized, so accessing it results in NULL dereference.
> Fix it by checking if the interface is up.
> Use -ENETDOWN as the error code when the interface is down.
>  -EFAULT in bnx2x_ptp_adjfreq() did not seem right.
> Tested using phc_ctl get/set/adj/freq commands.
> Signed-off-by: Michal Schmidt <>

While I have no objections to the patch contents, does it even make
sense to try adjusting frequencies on a DOWNed interface?
Wouldn't it make more sense checking this in the calling context

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