netdev - Re: [PATCH] phy: Replace genphy_update_link() call with phy_read

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Date:	Mon, 17 Sep 2012 13:22:16 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	asv@...go.com
Cc:	netdev@...r.kernel.org, afleming@...escale.com
Subject: Re: [PATCH] phy: Replace genphy_update_link() call with
 phy_read_status()

From: Alexander Sverdlin <asv@...go.com>
Date: Thu, 13 Sep 2012 09:20:43 +0200

> From: Alexander Sverdlin <alexander.sverdlin@...go.com>
> 
> Replace genphy_update_link() call with phy_read_status() 
> 
> Code in phy.c should not call genphy_*() functions directly, this breaks PHY layer abstraction.
> Some drivers may re-implement "read_status" callback and it's not being called in one place of
> PHY state machine, where genphy_update_link() is called instead. So fix it.
> For drivers that rely on genphy_* implementation nothing changed, as genphy_read_status() calls
> genphy_update_link() anyway.
> 
> Signed-off-by: Alexander Sverdlin <alexander.sverdlin@...go.com>

This is a behavioral change, not just a change to make sure the right
interfaces are used.

genphy_update_link() does only a small subset of the operations
performed by the generic read_status callback.

I'm not applying this patch, because all of those extra operations
might be unexpected in some situations and break some configurations.
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