Re: [PATCH net-next] net: phy: improve handling link_change_notify callback

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在 2019/3/13 上午1:50, Daniel Mack 写道:
On 12/3/2019 1:27 PM, Heiko Stuebner wrote:
Hi Andrew, Heiner,

Am Montag, 4. März 2019, 21:06:30 CET schrieb Andrew Lunn:
On Mon, Mar 04, 2019 at 11:30:25AM -0800, David Miller wrote:
From: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Date: Sun, 3 Mar 2019 19:58:57 +0100

Currently the Phy driver's link_change_notify callback is called
whenever the state machine is run (every second if polling), no matter
whether the state changed or not. This isn't needed and may confuse
users considering the name of the callback. Therefore let's change
the behavior and call this callback only in case of an actual
state change.

This requires changes to the at803x and rockchip drivers.
at803x can be simplified so that it reacts on a state change to
PHY_NOLINK only.
The rockchip driver can also be much simplified. We simply re-init
the AFE/DSP registers whenever we change to PHY_RUNNING and speed
is 100Mbps. This causes very small overhead because we do this even
if the speed was 100Mbps already. But this is neglectable and
I think justified by the much simpler code.

Changes are compile-tested only.

Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx>

Someone please review this.

Hi David

We should probably wait for a Tested-by: from Daniel Mack
<zonque@xxxxxxxxx> and David Wu <david.wu@xxxxxxxxxxxxxx>, or
equivalent.

We should probably add them to the list of recipients if we want
tests from them, which I've done now.

@David: patch in question that changes the Rockchip eth-phy is
https://patchwork.kernel.org/patch/10837217/

I think i can find a hardware to test this.


Sadly I don't have matching hardware to test this myself.

Thanks for considering me, but I don't have access to that hardware
either right now.

The changes look straight forward to me however, so just go ahead an
apply this. Once I get back to that setup, I'll report in case of a
regression.


Thanks,
Dainel






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