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rtc: ds1307: use sizeof
Use sizeof where possible to ensure we don't read/write more than the allocated buffer. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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parent
042fa8c7c0
commit
f2b4801201
1 changed files with 16 additions and 8 deletions
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@ -650,7 +650,8 @@ static irqreturn_t rx8130_irq(int irq, void *dev_id)
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mutex_lock(lock);
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/* Read control registers. */
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ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
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ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_EXTENSION, ctl,
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sizeof(ctl));
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if (ret < 0)
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goto out;
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if (!(ctl[1] & RX8130_REG_FLAG_AF))
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@ -658,7 +659,8 @@ static irqreturn_t rx8130_irq(int irq, void *dev_id)
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ctl[1] &= ~RX8130_REG_FLAG_AF;
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ctl[2] &= ~RX8130_REG_CONTROL0_AIE;
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ret = regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
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ret = regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl,
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sizeof(ctl));
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if (ret < 0)
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goto out;
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@ -680,12 +682,14 @@ static int rx8130_read_alarm(struct device *dev, struct rtc_wkalrm *t)
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return -EINVAL;
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/* Read alarm registers. */
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ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_ALARM_MIN, ald, 3);
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ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_ALARM_MIN, ald,
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sizeof(ald));
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if (ret < 0)
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return ret;
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/* Read control registers. */
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ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
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ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_EXTENSION, ctl,
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sizeof(ctl));
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if (ret < 0)
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return ret;
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@ -726,7 +730,8 @@ static int rx8130_set_alarm(struct device *dev, struct rtc_wkalrm *t)
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t->enabled, t->pending);
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/* Read control registers. */
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ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
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ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_EXTENSION, ctl,
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sizeof(ctl));
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if (ret < 0)
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return ret;
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@ -734,7 +739,8 @@ static int rx8130_set_alarm(struct device *dev, struct rtc_wkalrm *t)
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ctl[1] |= RX8130_REG_FLAG_AF;
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ctl[2] &= ~RX8130_REG_CONTROL0_AIE;
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ret = regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
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ret = regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl,
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sizeof(ctl));
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if (ret < 0)
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return ret;
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@ -743,7 +749,8 @@ static int rx8130_set_alarm(struct device *dev, struct rtc_wkalrm *t)
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ald[1] = bin2bcd(t->time.tm_hour);
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ald[2] = bin2bcd(t->time.tm_mday);
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ret = regmap_bulk_write(ds1307->regmap, RX8130_REG_ALARM_MIN, ald, 3);
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ret = regmap_bulk_write(ds1307->regmap, RX8130_REG_ALARM_MIN, ald,
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sizeof(ald));
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if (ret < 0)
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return ret;
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@ -752,7 +759,8 @@ static int rx8130_set_alarm(struct device *dev, struct rtc_wkalrm *t)
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ctl[2] |= RX8130_REG_CONTROL0_AIE;
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return regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
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return regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl,
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sizeof(ctl));
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}
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static int rx8130_alarm_irq_enable(struct device *dev, unsigned int enabled)
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