diff mbox series

x86: replace snprintf in show functions with sysfs_emit

Message ID 1634280641-4862-1-git-send-email-wangqing@vivo.com (mailing list archive)
State Accepted, archived
Headers show
Series x86: replace snprintf in show functions with sysfs_emit | expand

Commit Message

王擎 Oct. 15, 2021, 6:50 a.m. UTC 
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(-)

Comments

Hans de Goede Oct. 19, 2021, 3:12 p.m. UTC | #1 
Hi,

On 10/15/21 08:50, Qing Wang wrote:
> 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>

Thank you for your patch, I've applied this patch to my review-hans 
branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans

Note it will show up in my review-hans branch once I've pushed my
local branch there, which might take a while.

Once I've run some tests on this branch the patches there will be
added to the platform-drivers-x86/for-next branch and eventually
will be included in the pdx86 pull-request to Linus for the next
merge-window.

Regards,

Hans


> ---
>  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,
>
diff mbox series

Patch

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,