From: Ian Abbott <abbotti@mev.co.uk>
Date: Tue, 8 Oct 2013 18:06:36 +0000 (+0100)
Subject: staging: comedi: s626: add mmiowb() calls
X-Git-Tag: omap-for-v3.13/fixes-for-merge-window-take2~62^2~348
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bb49cddc02697b2e9d9c849488833055998ec863;p=pandora-kernel.git

staging: comedi: s626: add mmiowb() calls

`s626_mc_enable()` is often called to enable some function in a control
register after setting up some other registers.  Precede the write to
the control register with a call to `mmiowb()` to preserve mmio write
ordering.

`s626_mc_disable()` is called to disable some function in a control
register and is often followed up by writes to other registers.  Follow
the write to the control register with a call to `mmiowb()` to preserve
mmio write ordering.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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