linux-kernel - Re: [PATCH] drivers/block/xsysace - replace in(out)_8/in(out)_be16/in(out)

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Message-ID: <CACxGe6tMW_YpTfFn_gKu1YS9VzkOHfzJ1Ai6jVE7UiQQeZD-eg@mail.gmail.com>
Date:	Thu, 7 Feb 2013 17:16:15 +0000
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Alexey Brodkin <Alexey.Brodkin@...opsys.com>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Michal Simek <monstr@...str.eu>, Arnd Bergmann <arnd@...db.de>,
	Vineet Gupta <Vineet.Gupta1@...opsys.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	dahinds@...rs.sourceforge.net
Subject: Re: [PATCH] drivers/block/xsysace - replace in(out)_8/in(out)_be16/in(out)_le16
 with generic iowrite(read)8/16(be)

On Thu, Feb 7, 2013 at 4:56 PM, Alexey Brodkin
<Alexey.Brodkin@...opsys.com> wrote:
> On 02/07/2013 08:44 PM, Grant Likely wrote:
>> So, if I'm correct that means that for the data port (specifically
>> copying between RAM and the data port) using ioread16/iowrite16 on the
>> data port results in the correct behaviour. It also means that LE
>> support in the current driver is broken.
>
> That matches my earlier note when I wrote that for correct work on LE (note
> I'm on ARC, not PPC/MB) I needed to use "io{read|write}16" in
> "ace_data{in|out}_le16".
>
> With original "io{read|write}16be" instead data was corrupted.

In which case your bug-fix patch should drop the
ace_datain_le16/ace_dataout_le16 variants entirely and use the be16
ones for both (renaming appropriately).

g.

--
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
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