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Subject[PATCH v3 02/10] rtc: max77686: Use ARRAY_SIZE() instead of current array length
Date
It is better to use the ARRAY_SIZE() macro instead of the array length
to avoid bugs if the array is later changed and the length not updated.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>

---

Changes in v3:
- Add Krzysztof Kozlowski's Tested-by tag to patch #2.
- Add Laxman Dewangan's Acked-by tag to patch #2.
- Use ARRAY_SIZE() in all places. Suggested by Laxman Dewangan.

Changes in v2:
- Add Krzysztof Kozlowski's Reviewed-by tag to patch #2.

drivers/rtc/rtc-max77686.c | 23 ++++++++++++-----------
1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index 6653c3d11b66..d84a50c9f7f7 100644
--- a/drivers/rtc/rtc-max77686.c
+++ b/drivers/rtc/rtc-max77686.c
@@ -149,7 +149,7 @@ static int max77686_rtc_read_time(struct device *dev, struct rtc_time *tm)
goto out;

ret = regmap_bulk_read(info->max77686->rtc_regmap,
- MAX77686_RTC_SEC, data, RTC_NR_TIME);
+ MAX77686_RTC_SEC, data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to read time reg(%d)\n", __func__, ret);
goto out;
@@ -177,7 +177,7 @@ static int max77686_rtc_set_time(struct device *dev, struct rtc_time *tm)
mutex_lock(&info->lock);

ret = regmap_bulk_write(info->max77686->rtc_regmap,
- MAX77686_RTC_SEC, data, RTC_NR_TIME);
+ MAX77686_RTC_SEC, data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to write time reg(%d)\n", __func__,
ret);
@@ -205,7 +205,7 @@ static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
goto out;

ret = regmap_bulk_read(info->max77686->rtc_regmap,
- MAX77686_ALARM1_SEC, data, RTC_NR_TIME);
+ MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s:%d fail to read alarm reg(%d)\n",
__func__, __LINE__, ret);
@@ -215,7 +215,7 @@ static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
max77686_rtc_data_to_tm(data, &alrm->time, info->rtc_24hr_mode);

alrm->enabled = 0;
- for (i = 0; i < RTC_NR_TIME; i++) {
+ for (i = 0; i < ARRAY_SIZE(data); i++) {
if (data[i] & ALARM_ENABLE_MASK) {
alrm->enabled = 1;
break;
@@ -252,7 +252,7 @@ static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info)
goto out;

ret = regmap_bulk_read(info->max77686->rtc_regmap,
- MAX77686_ALARM1_SEC, data, RTC_NR_TIME);
+ MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to read alarm reg(%d)\n",
__func__, ret);
@@ -261,11 +261,11 @@ static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info)

max77686_rtc_data_to_tm(data, &tm, info->rtc_24hr_mode);

- for (i = 0; i < RTC_NR_TIME; i++)
+ for (i = 0; i < ARRAY_SIZE(data); i++)
data[i] &= ~ALARM_ENABLE_MASK;

ret = regmap_bulk_write(info->max77686->rtc_regmap,
- MAX77686_ALARM1_SEC, data, RTC_NR_TIME);
+ MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
__func__, ret);
@@ -291,7 +291,7 @@ static int max77686_rtc_start_alarm(struct max77686_rtc_info *info)
goto out;

ret = regmap_bulk_read(info->max77686->rtc_regmap,
- MAX77686_ALARM1_SEC, data, RTC_NR_TIME);
+ MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to read alarm reg(%d)\n",
__func__, ret);
@@ -312,7 +312,7 @@ static int max77686_rtc_start_alarm(struct max77686_rtc_info *info)
data[RTC_DATE] |= (1 << ALARM_ENABLE_SHIFT);

ret = regmap_bulk_write(info->max77686->rtc_regmap,
- MAX77686_ALARM1_SEC, data, RTC_NR_TIME);
+ MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
__func__, ret);
@@ -341,7 +341,7 @@ static int max77686_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
goto out;

ret = regmap_bulk_write(info->max77686->rtc_regmap,
- MAX77686_ALARM1_SEC, data, RTC_NR_TIME);
+ MAX77686_ALARM1_SEC, data, ARRAY_SIZE(data));

if (ret < 0) {
dev_err(info->dev, "%s: fail to write alarm reg(%d)\n",
@@ -406,7 +406,8 @@ static int max77686_rtc_init_reg(struct max77686_rtc_info *info)

info->rtc_24hr_mode = 1;

- ret = regmap_bulk_write(info->max77686->rtc_regmap, MAX77686_RTC_CONTROLM, data, 2);
+ ret = regmap_bulk_write(info->max77686->rtc_regmap,
+ MAX77686_RTC_CONTROLM, data, ARRAY_SIZE(data));
if (ret < 0) {
dev_err(info->dev, "%s: fail to write controlm reg(%d)\n",
__func__, ret);
--
2.5.0
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