netdev - Re: [PATCH] net: smc91: fix crash regression on the versatile

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Message-ID: <20131127121303.GM16735@n2100.arm.linux.org.uk>
Date:	Wed, 27 Nov 2013 12:13:03 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	netdev@...r.kernel.org, Nicolas Pitre <nico@...xnic.net>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Miao <eric.y.miao@...il.com>,
	Jonathan Cameron <jic23@....ac.uk>, stable@...r.kernel.org
Subject: Re: [PATCH] net: smc91: fix crash regression on the versatile

On Wed, Nov 27, 2013 at 12:51:39PM +0100, Linus Walleij wrote:
> This is because the macro operations in smc91x.h are missing
> necessary #defines for operations such as SMC_inbsw(),
> SMC_outsw() and SMC_outsb() making these defined to BUG().
> 
> The Versatile needs and uses the same accessors as the other
> platforms in the first if(...) clause, just switch it to using
> that and we have one problem less to worry about.
> 
> This bug seems to have been around for some quite time, just
> that few people test the Versatile on real hardware, and it
> compiles.

That's a misconception.  This bug is caused by:

commit e9e4ea74f06635f2ffc1dffe5ef40c854faa0a90
Author: Will Deacon <will.deacon@....com>
Date:   Fri Oct 11 14:52:20 2013 +0100

    net: smc91x: dont't use SMC_outw for fixing up halfword-aligned data
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