From: Jianqun Xu <jay.xu@rock-chips.com>
Date: Fri, 19 Aug 2016 07:44:14 +0000 (+0800)
Subject: PM / devfreq: rockchip-dfi: disable irqs during accessing ddr monitor
X-Git-Tag: firefly_0821_release~1669
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=edce4a4919a91713941bb4c15410369322511130;p=firefly-linux-kernel-4.4.55.git

PM / devfreq: rockchip-dfi: disable irqs during accessing ddr monitor

Change-Id: Ie4817a77fcb1283f37f41ab097f02ed7dc9cd18c
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
---

diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c
index 43fcc5a7f515..cd9287faf8fb 100644
--- a/drivers/devfreq/event/rockchip-dfi.c
+++ b/drivers/devfreq/event/rockchip-dfi.c
@@ -168,8 +168,11 @@ static int rockchip_dfi_get_event(struct devfreq_event_dev *edev,
 {
 	struct rockchip_dfi *info = devfreq_event_get_drvdata(edev);
 	int busier_ch;
+	unsigned long flags;
 
+	local_irq_save(flags);
 	busier_ch = rockchip_dfi_get_busier_ch(edev);
+	local_irq_restore(flags);
 
 	edata->load_count = info->ch_usage[busier_ch].access;
 	edata->total_count = info->ch_usage[busier_ch].total;