From f513b63f73e8bebc67a74dd46917788bfdf9c7cd Mon Sep 17 00:00:00 2001
From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Tue, 29 Apr 2014 12:59:28 -0700
Subject: [PATCH] staging: comedi: cb_pcidas: don't calc ai pacer divisors
 twice

The analog input async command can use the pacer for the scan_bagin_src
or the convert_src. The (*do_cmdtest) validates that only one of these
sources has the TRIG_TIMER selected and calculates the divisors when
validating the cmd argument.

There is no reason to recalc the divisors in the (*do_cmd). Just use
the values from the private data.

Also, refactor cb_pcidas_load_counters() to use the i8254_set_mode()
and i8254_write() helpers instead of i8254_load(). This allows us to
use the I8254_* defines when setting the mode to clarify the code.

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