Commit e8b4a78f authored Aug 05, 2014 by Junjie Wu

Revert "cpufreq: interactive: Allow 1 ms error in above_hispeed_delay comparisons"



This reverts commit ff6af807.

Commit ff6af807 tries to avoid a corner case where frequency is stuck in
hispeed_freq for one additional window. For example, if timer_rate is
20ms, and go_hispeed_delay is 40ms, frequency might be stuck at
hispeed_freq for 60ms due to imprecision in jiffies. Same problem can be
easily solved by making go_hispeed_delay 1ms smaller instead of changing
the code.

Change-Id: Idab7c29ed28374df219210e444454068864d144d
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>

parent 9b665d2b

drivers/cpufreq/cpufreq_interactive.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -213,7 +213,6 @@ static unsigned int freq_to_above_hispeed_delay(
		;

		ret = tunables->above_hispeed_delay[i];
		ret = (ret > (1 * USEC_PER_MSEC)) ? (ret - (1 * USEC_PER_MSEC)) : ret;
		spin_unlock_irqrestore(&tunables->above_hispeed_delay_lock, flags);
		return ret;
		}