rtc: rx8025: protect ctrl1 register update by rtc->ops_lock

[mirror_ubuntu-artful-kernel.git] / drivers / rtc / rtc-rx8025.c

diff --git a/drivers/rtc/rtc-rx8025.c b/drivers/rtc/rtc-rx8025.c
index 18240f526adede006710f01b4a335296411cc34a..259995281e0df910a6bac4438fe5696a99a07bea 100644 (file)
--- a/drivers/rtc/rtc-rx8025.c
+++ b/drivers/rtc/rtc-rx8025.c
@@ -146,8 +146,10 @@ static irqreturn_t rx8025_handle_irq(int irq, void *dev_id)
 {
        struct i2c_client *client = dev_id;
        struct rx8025_data *rx8025 = i2c_get_clientdata(client);
+       struct mutex *lock = &rx8025->rtc->ops_lock;
        int status;
 
+       mutex_lock(lock);
        status = rx8025_read_reg(client, RX8025_REG_CTRL2);
        if (status < 0)
                goto out;
@@ -172,6 +174,8 @@ static irqreturn_t rx8025_handle_irq(int irq, void *dev_id)
        }
 
 out:
+       mutex_unlock(lock);
+
        return IRQ_HANDLED;
 }