hwmon: replace snprintf in show functions with sysfs_emit

coccicheck complains about the use of snprintf() in sysfs
show functions.

drivers/hwmon/ina3221.c:701:8-16: WARNING: use scnprintf or sprintf

This results in a large number of patch submissions. Fix it all in
one go using the following coccinelle rules. Use sysfs_emit instead
of scnprintf or sprintf since that makes more sense.

@depends on patch@
identifier show, dev, attr, buf;
@@

ssize_t show(struct device *dev, struct device_attribute *attr, char *buf)
{
	<...
  return
-		snprintf(buf, \( PAGE_SIZE \| PAGE_SIZE - 1 \),
+		sysfs_emit(buf,
		...);
	...>
}

@depends on patch@
identifier show, dev, attr, buf, rc;
@@

ssize_t show(struct device *dev, struct device_attribute *attr, char *buf)
{
	<...
  rc =
-		snprintf(buf, \( PAGE_SIZE \| PAGE_SIZE - 1 \),
+		sysfs_emit(buf,
		...);
	...>
}

While at it, remove unnecessary braces and as well as unnecessary
else after return statements to address checkpatch warnings in the
resulting patch.

Cc: Zihao Tang <tangzihao1@hisilicon.com>
Cc: Jay Fang <f.fangjian@huawei.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/hwmon/ltc4215.c b/drivers/hwmon/ltc4215.c
index 7cef3cb2962b..1d18c212054f 100644
--- a/drivers/hwmon/ltc4215.c
+++ b/drivers/hwmon/ltc4215.c
@@ -139,7 +139,7 @@ static ssize_t ltc4215_voltage_show(struct device *dev,
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
 	const int voltage = ltc4215_get_voltage(dev, attr->index);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", voltage);
+	return sysfs_emit(buf, "%d\n", voltage);
 }
 
 static ssize_t ltc4215_current_show(struct device *dev,
@@ -147,7 +147,7 @@ static ssize_t ltc4215_current_show(struct device *dev,
 {
 	const unsigned int curr = ltc4215_get_current(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", curr);
+	return sysfs_emit(buf, "%u\n", curr);
 }
 
 static ssize_t ltc4215_power_show(struct device *dev,
@@ -159,7 +159,7 @@ static ssize_t ltc4215_power_show(struct device *dev,
 	/* current in mA * voltage in mV == power in uW */
 	const unsigned int power = abs(output_voltage * curr);
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", power);
+	return sysfs_emit(buf, "%u\n", power);
 }
 
 static ssize_t ltc4215_alarm_show(struct device *dev,
@@ -170,7 +170,7 @@ static ssize_t ltc4215_alarm_show(struct device *dev,
 	const u8 reg = data->regs[LTC4215_STATUS];
 	const u32 mask = attr->index;
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", !!(reg & mask));
+	return sysfs_emit(buf, "%u\n", !!(reg & mask));
 }
 
 /*