From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Andrew Lunn <andrew@lunn.ch>
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH 10/13] ftgmac100: Add a reset task and use it for link changes
Date: Mon, 03 Apr 2017 07:05:50 +1000 [thread overview]
Message-ID: <1491167150.26047.14.camel@kernel.crashing.org> (raw)
In-Reply-To: <20170402184237.GB5189@lunn.ch>
On Sun, 2017-04-02 at 20:42 +0200, Andrew Lunn wrote:
> Have you run lockdep tests on this? I think it is normal to take the
> rtnl lock first, then the phydev lock. Try some ethtool operations
> and see if you get a splat.
You are right. I actually realized that was wrong last night ;-) It
will splat with the order in open/close.
Just a stupid thinko (I added the phy lock in a second pass). I'll
fix that.
> Also, do you need to be worried about mdio operations? Do you need to
> take that lock as well, since there might be other PHYs, or an
> Ethernet switch on the bus?
There could be I suppose, none of the setups I've seen with those
SoC has done it but nothing prevents it, I'll have a look.
Thanks.
Ben.
next prev parent reply other threads:[~2017-04-02 21:05 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-02 3:35 [PATCH 00/13] ftgmac100: Rework batch 1 - Link & Interrupts Benjamin Herrenschmidt
2017-04-02 3:35 ` [PATCH 01/13] ftgmac100: Use netdev->irq instead of private copy Benjamin Herrenschmidt
2017-04-02 3:35 ` [PATCH 02/13] ftgmac100: Remove "banner" comments Benjamin Herrenschmidt
2017-04-02 3:35 ` [PATCH 03/13] ftgmac100: Reorder struct fields and comment Benjamin Herrenschmidt
2017-04-02 3:35 ` [PATCH 04/13] ftgmac100: Remove "enabled" flags Benjamin Herrenschmidt
2017-04-02 3:35 ` [PATCH 05/13] ftgmac100: Cleanup speed/duplex tracking and fix duplex config Benjamin Herrenschmidt
2017-04-02 18:28 ` Andrew Lunn
2017-04-02 21:03 ` Benjamin Herrenschmidt
2017-04-02 21:35 ` Benjamin Herrenschmidt
2017-04-02 21:27 ` Benjamin Herrenschmidt
2017-04-02 3:35 ` [PATCH 06/13] ftgmac100: Split ring alloc, init and rx buffer alloc Benjamin Herrenschmidt
2017-04-02 3:35 ` [PATCH 07/13] ftgmac100: Move napi_add/del to open/close Benjamin Herrenschmidt
2017-04-02 3:35 ` [PATCH 08/13] ftgmac100: Request the interrupt only after HW is reset Benjamin Herrenschmidt
2017-04-02 3:35 ` [PATCH 09/13] ftgmac100: Move the bulk of inits to a separate function Benjamin Herrenschmidt
2017-04-02 3:35 ` [PATCH 10/13] ftgmac100: Add a reset task and use it for link changes Benjamin Herrenschmidt
2017-04-02 18:42 ` Andrew Lunn
2017-04-02 21:05 ` Benjamin Herrenschmidt [this message]
2017-04-02 21:24 ` Benjamin Herrenschmidt
2017-04-03 6:46 ` Benjamin Herrenschmidt
2017-04-02 20:56 ` Benjamin Herrenschmidt
2017-04-02 3:35 ` [PATCH 11/13] ftgmac100: Rework MAC reset and init Benjamin Herrenschmidt
2017-04-02 3:35 ` [PATCH 12/13] ftgmac100: Remove useless tests in interrupt handler Benjamin Herrenschmidt
2017-04-02 3:35 ` [PATCH 13/13] ftgmac100: Rework NAPI & interrupts handling Benjamin Herrenschmidt
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