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Date: Fri, 24 Mar 2017 00:43:12 +0000 From: "Brown, Aaron F" <aaron.f.brown@...el.com> To: Bernd Faust <berndfaust@...il.com>, "Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>, "Lubetkin, YanirX" <yanirx.lubetkin@...el.com>, "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: RE: [PATCH] e1000e: fix timing for 82579 Gigabit Ethernet controller > From: netdev-owner@...r.kernel.org [mailto:netdev- > owner@...r.kernel.org] On Behalf Of Bernd Faust > Sent: Thursday, February 16, 2017 10:42 AM > To: Kirsher, Jeffrey T <jeffrey.t.kirsher@...el.com>; Lubetkin, YanirX > <yanirx.lubetkin@...el.com>; intel-wired-lan@...ts.osuosl.org; > netdev@...r.kernel.org; linux-kernel@...r.kernel.org > Cc: Bernd Faust <berndfaust@...il.com> > Subject: [PATCH] e1000e: fix timing for 82579 Gigabit Ethernet controller > > After an upgrade to Linux kernel v4.x the hardware timestamps of the > 82579 Gigabit Ethernet Controller are different than expected. > The values that are being read are almost four times as big as before > the kernel upgrade. > > The difference is that after the upgrade the driver sets the clock > frequency to 25MHz, where before the upgrade it was set to 96MHz. Intel > confirmed that the correct frequency for this network adapter is 96MHz. > > Signed-off-by: Bernd Faust <berndfaust@...il.com> > --- > drivers/net/ethernet/intel/e1000e/netdev.c | 6 ++++++ > 1 file changed, 6 insertions(+) Tested-by: Aaron Brown <aaron.f.brown@...el.com>
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