linux-kernel - [PATCH v2 4/9] clocksource/cadence_ttc: Use enable/disable

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Message-Id: <1385514296-26702-5-git-send-email-soren.brinkmann@xilinx.com>
Date:	Tue, 26 Nov 2013 17:04:51 -0800
From:	Soren Brinkmann <soren.brinkmann@...inx.com>
To:	Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Russell King <linux@....linux.org.uk>,
	Michal Simek <michal.simek@...inx.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org,
	Soren Brinkmann <soren.brinkmann@...inx.com>
Subject: [PATCH v2 4/9] clocksource/cadence_ttc: Use enable/disable_irq

To ensure that the timer interrupt is properly enabled/disabled across
the whole CPU cluster use enable/disable_irq() instead of
local_irq_disable().

Signed-off-by: Soren Brinkmann <soren.brinkmann@...inx.com>
---
 drivers/clocksource/cadence_ttc_timer.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/clocksource/cadence_ttc_timer.c b/drivers/clocksource/cadence_ttc_timer.c
index a92350b55d32..246d018d1e63 100644
--- a/drivers/clocksource/cadence_ttc_timer.c
+++ b/drivers/clocksource/cadence_ttc_timer.c
@@ -322,18 +322,16 @@ static int ttc_rate_change_clockevent_cb(struct notifier_block *nb,
 	switch (event) {
 	case POST_RATE_CHANGE:
 	{
-		unsigned long flags;
-
 		/*
 		 * clockevents_update_freq should be called with IRQ disabled on
 		 * the CPU the timer provides events for. The timer we use is
 		 * common to both CPUs, not sure if we need to run on both
 		 * cores.
 		 */
-		local_irq_save(flags);
+		disable_irq(ttcce->ce.irq);
 		clockevents_update_freq(&ttcce->ce,
 				ndata->new_rate / PRESCALE);
-		local_irq_restore(flags);
+		enable_irq(ttcce->ce.irq);
 
 		/* update cached frequency */
 		ttc->freq = ndata->new_rate;
-- 
1.8.4.4

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