netdev - Re: [PATCH 14/14] net: smc91x: dont't use SMC_outw for fixing up halfword-aligned data

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Message-Id: <20131011.175622.988103254853137065.davem@davemloft.net>
Date:	Fri, 11 Oct 2013 17:56:22 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	matthew.leach@....com
Cc:	linux-arm-kernel@...ts.infradead.org, ankit.jindal@...aro.org,
	steve.mcintyre@...aro.org, tushar.jagad@...aro.org,
	will.deacon@....com, catalin.marinas@....com,
	netdev@...r.kernel.org, nico@...xnic.net
Subject: Re: [PATCH 14/14] net: smc91x: dont't use SMC_outw for fixing up
 halfword-aligned data

From: Matthew Leach <matthew.leach@....com>
Date: Fri, 11 Oct 2013 14:52:20 +0100

> From: Will Deacon <will.deacon@....com>
> 
> SMC_outw invokes an endian-aware I/O accessor, which may change the data
> endianness before writing to the device. This is not suitable for data
> transfers where the memory buffer is simply a string of bytes that does
> not require any byte-swapping.
> 
> This patches fixes the smc91x SMC_PUSH_DATA macro so that it uses the
> string I/O accessor for outputting the leading or trailing halfwords on
> halfword-aligned buffers.
> 
> Cc: <netdev@...r.kernel.org>
> Cc: Nicolas Pitre <nico@...xnic.net>
> Cc: David S. Miller <davem@...emloft.net>
> Signed-off-by: Will Deacon <will.deacon@....com>

Applied.
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