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From: Andrew Lunn <andrew@lunn.ch>
To: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	kernel@savoirfairelinux.com,
	"David S. Miller" <davem@davemloft.net>,
	Florian Fainelli <f.fainelli@gmail.com>
Subject: Re: [PATCH v2 net-next v2 10/12] net: dsa: mv88e6xxx: iterate on compatible info
Date: Tue, 14 Jun 2016 23:46:58 +0200	[thread overview]
Message-ID: <20160614214658.GG12832@lunn.ch> (raw)
In-Reply-To: <20160614183153.32327-11-vivien.didelot@savoirfairelinux.com>

On Tue, Jun 14, 2016 at 02:31:51PM -0400, Vivien Didelot wrote:
> With legacy probing, we cannot have a compatible info structure. We have
> to guess it. Instead of using only the first info structure of the info
> table, iterate over the compatible data.
> 
> That way, the legacy code will support new compatible chips with
> different register access without requiring any code change.

I don't think this is safe when used in combination with multi-chip
addresses. This code will perform writes on various addresses,
addresses which could be real registers on a device.

I don't see a need to support guessing. The new binding will work,
without any guessing. So use that.

	Andrew

  parent reply	other threads:[~2016-06-14 21:47 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-14 18:31 [PATCH v2 net-next v2 00/12] net: dsa: mv88e6xxx: misc probe improvements Vivien Didelot
2016-06-14 18:31 ` [PATCH v2 net-next v2 01/12] net: dsa: mv88e6xxx: fix style issues Vivien Didelot
2016-06-14 21:14   ` Andrew Lunn
2016-06-14 18:31 ` [PATCH v2 net-next v2 02/12] net: dsa: mv88e6xxx: remove redundant assignments Vivien Didelot
2016-06-14 18:31 ` [PATCH v2 net-next v2 03/12] net: dsa: mv88e6xxx: use already declared variables Vivien Didelot
2016-06-14 18:31 ` [PATCH v2 net-next v2 04/12] net: dsa: mv88e6xxx: do not increment bus refcount Vivien Didelot
2016-06-14 18:31 ` [PATCH v2 net-next v2 05/12] net: dsa: mv88e6xxx: add switch register helpers Vivien Didelot
2016-06-14 21:17   ` Andrew Lunn
2016-06-14 18:31 ` [PATCH v2 net-next v2 06/12] net: dsa: mv88e6xxx: add port base address to info Vivien Didelot
2016-06-14 18:31 ` [PATCH v2 net-next v2 07/12] net: dsa: mv88e6xxx: put chip info in ID table Vivien Didelot
2016-06-14 18:31 ` [PATCH v2 net-next v2 08/12] net: dsa: mv88e6xxx: read switch ID from info Vivien Didelot
2016-06-14 18:50   ` Sergei Shtylyov
2016-06-14 21:01     ` Vivien Didelot
2016-06-14 18:31 ` [PATCH v2 net-next v2 09/12] net: dsa: mv88e6xxx: add SMI detection helper Vivien Didelot
2016-06-14 21:50   ` Andrew Lunn
2016-06-14 22:10     ` Vivien Didelot
2016-06-14 18:31 ` [PATCH v2 net-next v2 10/12] net: dsa: mv88e6xxx: iterate on compatible info Vivien Didelot
2016-06-14 19:38   ` Sergei Shtylyov
2016-06-14 21:46   ` Andrew Lunn [this message]
2016-06-14 22:13     ` Vivien Didelot
2016-06-14 18:31 ` [PATCH v2 net-next v2 11/12] net: dsa: mv88e6xxx: add an SMI ops structure Vivien Didelot
2016-06-14 22:04   ` Andrew Lunn
2016-06-14 22:26     ` Vivien Didelot
2016-06-14 18:31 ` [PATCH v2 net-next v2 12/12] net: dsa: mv88e6xxx: add addressing mode to info Vivien Didelot
2016-06-14 21:34   ` Andrew Lunn
2016-06-14 21:52     ` Vivien Didelot
2016-06-14 22:09   ` Andrew Lunn
2016-06-14 22:24     ` Vivien Didelot
2016-06-14 22:44       ` Andrew Lunn
2016-06-14 23:11         ` Vivien Didelot

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