target/linux/brcm2708/patches-4.4/0218-cpufreq-Temporarily-ignore-io_is_busy-1.patch

   1 From dd1c9e1693db72a6dd5c7a62fbfae4c30b97d5d9 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Wed, 30 Mar 2016 17:23:15 +0100
   4 Subject: [PATCH] cpufreq: Temporarily ignore io_is_busy=1
   5
   6 To speed testing of the new sdhost driver that adapts to changes in
   7 core_freq, hack the on-demand governor to treat io_is_busy=1 as
   8 io_is_busy=0. The io_is_busy feature can still be forced using
   9 io_is_busy=2.
  10
  11 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  12 ---
  13  drivers/cpufreq/cpufreq_ondemand.c | 7 ++++++-
  14  1 file changed, 6 insertions(+), 1 deletion(-)
  15
  16 --- a/drivers/cpufreq/cpufreq_ondemand.c
  17 +++ b/drivers/cpufreq/cpufreq_ondemand.c
  18 @@ -307,7 +307,12 @@ static ssize_t store_io_is_busy(struct d
  19         ret = sscanf(buf, "%u", &input);
  20         if (ret != 1)
  21                 return -EINVAL;
  22 -       od_tuners->io_is_busy = !!input;
  23 +       // XXX temporary hack
  24 +       if (input > 1)
  25 +               input = 1;
  26 +       else
  27 +               input = 0;
  28 +       od_tuners->io_is_busy = input;
  29
  30         /* we need to re-evaluate prev_cpu_idle */
  31         for_each_online_cpu(j) {