staging: comedi: s626: add mmiowb() calls

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`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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Ian Abbott 2013-10-08 19:06:36 +01:00 • committed by Greg Kroah-Hartman

parent c3e3a56d40

commit bb49cddc02

1 changed files with 2 additions and 0 deletions

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drivers/staging/comedi/drivers/s626.c

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