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Message-ID: <7c6c583a46c157b549d855039566fac9@codeaurora.org>
Date: Thu, 07 Jan 2021 14:08:11 +0800
From: Can Guo <cang@...eaurora.org>
To: Bean Huo <huobean@...il.com>
Cc: alim.akhtar@...sung.com, avri.altman@....com,
asutoshd@...eaurora.org, jejb@...ux.ibm.com,
martin.petersen@...cle.com, stanley.chu@...iatek.com,
beanhuo@...ron.com, bvanassche@....org, tomas.winkler@...el.com,
linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] scsi: ufs: Replace sprintf and snprintf with
sysfs_emit
On 2021-01-07 05:15, Bean Huo wrote:
> From: Bean Huo <beanhuo@...ron.com>
>
> sprintf and snprintf may cause output defect in sysfs content, it is
> better to use new added sysfs_emit function which knows the size of the
> temporary buffer.
>
Reviewed-by: Can Guo <cang@...eaurora.org>
> Reviewed-by: Avri Altman <avri.altman@....com>
> Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Signed-off-by: Bean Huo <beanhuo@...ron.com>
> ---
> Nothing changed in this patch, just take it out from patchset:
> https://patchwork.kernel.org/project/linux-scsi/cover/20201224172010.10701-1-huobean@gmail.com/
>
> ---
> drivers/scsi/ufs/ufs-sysfs.c | 30 +++++++++++++++---------------
> 1 file changed, 15 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/scsi/ufs/ufs-sysfs.c
> b/drivers/scsi/ufs/ufs-sysfs.c
> index 08e72b7eef6a..0e1438485133 100644
> --- a/drivers/scsi/ufs/ufs-sysfs.c
> +++ b/drivers/scsi/ufs/ufs-sysfs.c
> @@ -67,7 +67,7 @@ static ssize_t rpm_lvl_show(struct device *dev,
> {
> struct ufs_hba *hba = dev_get_drvdata(dev);
>
> - return sprintf(buf, "%d\n", hba->rpm_lvl);
> + return sysfs_emit(buf, "%d\n", hba->rpm_lvl);
> }
>
> static ssize_t rpm_lvl_store(struct device *dev,
> @@ -81,7 +81,7 @@ static ssize_t rpm_target_dev_state_show(struct
> device *dev,
> {
> struct ufs_hba *hba = dev_get_drvdata(dev);
>
> - return sprintf(buf, "%s\n", ufschd_ufs_dev_pwr_mode_to_string(
> + return sysfs_emit(buf, "%s\n", ufschd_ufs_dev_pwr_mode_to_string(
> ufs_pm_lvl_states[hba->rpm_lvl].dev_state));
> }
>
> @@ -90,7 +90,7 @@ static ssize_t rpm_target_link_state_show(struct
> device *dev,
> {
> struct ufs_hba *hba = dev_get_drvdata(dev);
>
> - return sprintf(buf, "%s\n", ufschd_uic_link_state_to_string(
> + return sysfs_emit(buf, "%s\n", ufschd_uic_link_state_to_string(
> ufs_pm_lvl_states[hba->rpm_lvl].link_state));
> }
>
> @@ -99,7 +99,7 @@ static ssize_t spm_lvl_show(struct device *dev,
> {
> struct ufs_hba *hba = dev_get_drvdata(dev);
>
> - return sprintf(buf, "%d\n", hba->spm_lvl);
> + return sysfs_emit(buf, "%d\n", hba->spm_lvl);
> }
>
> static ssize_t spm_lvl_store(struct device *dev,
> @@ -113,7 +113,7 @@ static ssize_t spm_target_dev_state_show(struct
> device *dev,
> {
> struct ufs_hba *hba = dev_get_drvdata(dev);
>
> - return sprintf(buf, "%s\n", ufschd_ufs_dev_pwr_mode_to_string(
> + return sysfs_emit(buf, "%s\n", ufschd_ufs_dev_pwr_mode_to_string(
> ufs_pm_lvl_states[hba->spm_lvl].dev_state));
> }
>
> @@ -122,7 +122,7 @@ static ssize_t spm_target_link_state_show(struct
> device *dev,
> {
> struct ufs_hba *hba = dev_get_drvdata(dev);
>
> - return sprintf(buf, "%s\n", ufschd_uic_link_state_to_string(
> + return sysfs_emit(buf, "%s\n", ufschd_uic_link_state_to_string(
> ufs_pm_lvl_states[hba->spm_lvl].link_state));
> }
>
> @@ -165,7 +165,7 @@ static ssize_t auto_hibern8_show(struct device
> *dev,
> ufshcd_release(hba);
> pm_runtime_put_sync(hba->dev);
>
> - return scnprintf(buf, PAGE_SIZE, "%d\n", ufshcd_ahit_to_us(ahit));
> + return sysfs_emit(buf, "%d\n", ufshcd_ahit_to_us(ahit));
> }
>
> static ssize_t auto_hibern8_store(struct device *dev,
> @@ -233,18 +233,18 @@ static ssize_t ufs_sysfs_read_desc_param(struct
> ufs_hba *hba,
> return -EINVAL;
> switch (param_size) {
> case 1:
> - ret = sprintf(sysfs_buf, "0x%02X\n", *desc_buf);
> + ret = sysfs_emit(sysfs_buf, "0x%02X\n", *desc_buf);
> break;
> case 2:
> - ret = sprintf(sysfs_buf, "0x%04X\n",
> + ret = sysfs_emit(sysfs_buf, "0x%04X\n",
> get_unaligned_be16(desc_buf));
> break;
> case 4:
> - ret = sprintf(sysfs_buf, "0x%08X\n",
> + ret = sysfs_emit(sysfs_buf, "0x%08X\n",
> get_unaligned_be32(desc_buf));
> break;
> case 8:
> - ret = sprintf(sysfs_buf, "0x%016llX\n",
> + ret = sysfs_emit(sysfs_buf, "0x%016llX\n",
> get_unaligned_be64(desc_buf));
> break;
> }
> @@ -609,7 +609,7 @@ static ssize_t _name##_show(struct device
> *dev, \
> SD_ASCII_STD); \
> if (ret < 0) \
> goto out; \
> - ret = snprintf(buf, PAGE_SIZE, "%s\n", desc_buf); \
> + ret = sysfs_emit(buf, "%s\n", desc_buf); \
> out: \
> pm_runtime_put_sync(hba->dev); \
> kfree(desc_buf); \
> @@ -659,7 +659,7 @@ static ssize_t _name##_show(struct device
> *dev, \
> pm_runtime_put_sync(hba->dev); \
> if (ret) \
> return -EINVAL; \
> - return sprintf(buf, "%s\n", flag ? "true" : "false"); \
> + return sysfs_emit(buf, "%s\n", flag ? "true" : "false"); \
> } \
> static DEVICE_ATTR_RO(_name)
>
> @@ -717,7 +717,7 @@ static ssize_t _name##_show(struct device
> *dev, \
> pm_runtime_put_sync(hba->dev); \
> if (ret) \
> return -EINVAL; \
> - return sprintf(buf, "0x%08X\n", value); \
> + return sysfs_emit(buf, "0x%08X\n", value); \
> } \
> static DEVICE_ATTR_RO(_name)
>
> @@ -856,7 +856,7 @@ static ssize_t
> dyn_cap_needed_attribute_show(struct device *dev,
> pm_runtime_put_sync(hba->dev);
> if (ret)
> return -EINVAL;
> - return sprintf(buf, "0x%08X\n", value);
> + return sysfs_emit(buf, "0x%08X\n", value);
> }
> static DEVICE_ATTR_RO(dyn_cap_needed_attribute);
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