rtc: max77686: Use ARRAY_SIZE() instead of current array length

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>
Reviewed-by: Andi Shyti <andi.shyti@samsung.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index 6653c3d11b668abed47e32068448ee9150b528b0..d84a50c9f7f7574d2b6e79ac0fe0be1fa49a05b3 100644 (file)
--- 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);