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Subject[PATCH] x86: replace snprintf in show functions with sysfs_emit
Date
show() must not use snprintf() when formatting the value to be
returned to user space.

Fix the coccicheck warnings:
WARNING: use scnprintf or sprintf.

Use sysfs_emit instead of scnprintf or sprintf makes more sense.

Signed-off-by: Qing Wang <wangqing@vivo.com>
---
drivers/platform/x86/panasonic-laptop.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c
index d4f4444..37850d0 100644
--- a/drivers/platform/x86/panasonic-laptop.c
+++ b/drivers/platform/x86/panasonic-laptop.c
@@ -470,7 +470,7 @@ static ssize_t numbatt_show(struct device *dev, struct device_attribute *attr,
if (!acpi_pcc_retrieve_biosdata(pcc))
return -EIO;

- return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]);
+ return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]);
}

static ssize_t lcdtype_show(struct device *dev, struct device_attribute *attr,
@@ -482,7 +482,7 @@ static ssize_t lcdtype_show(struct device *dev, struct device_attribute *attr,
if (!acpi_pcc_retrieve_biosdata(pcc))
return -EIO;

- return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_LCD_TYPE]);
+ return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_LCD_TYPE]);
}

static ssize_t mute_show(struct device *dev, struct device_attribute *attr,
@@ -494,7 +494,7 @@ static ssize_t mute_show(struct device *dev, struct device_attribute *attr,
if (!acpi_pcc_retrieve_biosdata(pcc))
return -EIO;

- return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_MUTE]);
+ return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_MUTE]);
}

static ssize_t mute_store(struct device *dev, struct device_attribute *attr,
@@ -524,7 +524,7 @@ static ssize_t sticky_key_show(struct device *dev, struct device_attribute *attr
if (!acpi_pcc_retrieve_biosdata(pcc))
return -EIO;

- return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sticky_key);
+ return sysfs_emit(buf, "%u\n", pcc->sticky_key);
}

static ssize_t sticky_key_store(struct device *dev, struct device_attribute *attr,
@@ -566,7 +566,7 @@ static ssize_t eco_mode_show(struct device *dev, struct device_attribute *attr,
result = -EIO;
break;
}
- return snprintf(buf, PAGE_SIZE, "%u\n", result);
+ return sysfs_emit(buf, "%u\n", result);
}

static ssize_t eco_mode_store(struct device *dev, struct device_attribute *attr,
@@ -625,7 +625,7 @@ static ssize_t ac_brightness_show(struct device *dev, struct device_attribute *a
if (!acpi_pcc_retrieve_biosdata(pcc))
return -EIO;

- return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_AC_CUR_BRIGHT]);
+ return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_AC_CUR_BRIGHT]);
}

static ssize_t ac_brightness_store(struct device *dev, struct device_attribute *attr,
@@ -655,7 +655,7 @@ static ssize_t dc_brightness_show(struct device *dev, struct device_attribute *a
if (!acpi_pcc_retrieve_biosdata(pcc))
return -EIO;

- return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_DC_CUR_BRIGHT]);
+ return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_DC_CUR_BRIGHT]);
}

static ssize_t dc_brightness_store(struct device *dev, struct device_attribute *attr,
@@ -685,7 +685,7 @@ static ssize_t current_brightness_show(struct device *dev, struct device_attribu
if (!acpi_pcc_retrieve_biosdata(pcc))
return -EIO;

- return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_CUR_BRIGHT]);
+ return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_CUR_BRIGHT]);
}

static ssize_t current_brightness_store(struct device *dev, struct device_attribute *attr,
@@ -710,7 +710,7 @@ static ssize_t current_brightness_store(struct device *dev, struct device_attrib
static ssize_t cdpower_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- return snprintf(buf, PAGE_SIZE, "%d\n", get_optd_power_state());
+ return sysfs_emit(buf, "%d\n", get_optd_power_state());
}

static ssize_t cdpower_store(struct device *dev, struct device_attribute *attr,
--
2.7.4
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