linux-kernel - [PATCH 4.2.y-ckt 181/218] rtc: ds1685: passing bogus values to irq

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Date:	Thu, 31 Mar 2016 13:16:34 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Dan Carpenter <dan.carpenter@...cle.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 4.2.y-ckt 181/218] rtc: ds1685: passing bogus values to irq_restore

4.2.8-ckt7 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 8c09b9fdecab1f4a289f07b46e2ad174b6641928 upstream.

We call spin_lock_irqrestore with "flags" set to zero instead of to the
value from spin_lock_irqsave().

Fixes: aaaf5fbf56f1 ('rtc: add driver for DS1685 family of real time clocks')
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/rtc/rtc-ds1685.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/rtc/rtc-ds1685.c b/drivers/rtc/rtc-ds1685.c
index 818a363..8686588 100644
--- a/drivers/rtc/rtc-ds1685.c
+++ b/drivers/rtc/rtc-ds1685.c
@@ -187,9 +187,9 @@ ds1685_rtc_end_data_access(struct ds1685_priv *rtc)
  * Only use this where you are certain another lock will not be held.
  */
 static inline void
-ds1685_rtc_begin_ctrl_access(struct ds1685_priv *rtc, unsigned long flags)
+ds1685_rtc_begin_ctrl_access(struct ds1685_priv *rtc, unsigned long *flags)
 {
-	spin_lock_irqsave(&rtc->lock, flags);
+	spin_lock_irqsave(&rtc->lock, *flags);
 	ds1685_rtc_switch_to_bank1(rtc);
 }
 
@@ -1304,7 +1304,7 @@ ds1685_rtc_sysfs_ctrl_regs_store(struct device *dev,
 {
 	struct ds1685_priv *rtc = dev_get_drvdata(dev);
 	u8 reg = 0, bit = 0, tmp;
-	unsigned long flags = 0;
+	unsigned long flags;
 	long int val = 0;
 	const struct ds1685_rtc_ctrl_regs *reg_info =
 		ds1685_rtc_sysfs_ctrl_regs_lookup(attr->attr.name);
@@ -1325,7 +1325,7 @@ ds1685_rtc_sysfs_ctrl_regs_store(struct device *dev,
 	bit = reg_info->bit;
 
 	/* Safe to spinlock during a write. */
-	ds1685_rtc_begin_ctrl_access(rtc, flags);
+	ds1685_rtc_begin_ctrl_access(rtc, &flags);
 	tmp = rtc->read(rtc, reg);
 	rtc->write(rtc, reg, (val ? (tmp | bit) : (tmp & ~(bit))));
 	ds1685_rtc_end_ctrl_access(rtc, flags);
-- 
2.7.4