Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Sat, 17 Dec 2022 20:31:33 +0530
From:   Deepak R Varma <drv@mailo.com>
To:     Jack Wang <jinpu.wang@cloud.ionos.com>,
        "James E.J. Bottomley" <jejb@linux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     Saurabh Singh Sengar <ssengar@microsoft.com>,
        Praveen Kumar <kumarpraveen@linux.microsoft.com>, drv@mailo.com
Subject: Re: [PATCH] scsi: pm8001: Use sysfs_emit in show function callsbacks
Message-ID: <Y53ZzSvDz8w7fZyr@qemulion>
References: <Y5JE/xI2NNbnox/A@qemulion>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <Y5JE/xI2NNbnox/A@qemulion>
Precedence: bulk

On Fri, Dec 09, 2022 at 01:41:43AM +0530, Deepak R Varma wrote:
> According to Documentation/filesystems/sysfs.rst, the show() callback
> function of kobject attributes should strictly use sysfs_emit instead
> of sprintf family functions.
> Issue identified using the coccinelle device_attr_show.cocci script.
>
> Signed-off-by: Deepak R Varma <drv@mailo.com>
> ---

Hello All,
Just wanted to follow up on this patch submitted earlier. May I please request
a review and feedback on this patch.

Thank you,
./drv

>  drivers/scsi/pm8001/pm8001_ctl.c | 48 +++++++++++++++-----------------
>  1 file changed, 22 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/scsi/pm8001/pm8001_ctl.c b/drivers/scsi/pm8001/pm8001_ctl.c
> index 73f036bed128..8cfdf9b412c9 100644
> --- a/drivers/scsi/pm8001/pm8001_ctl.c
> +++ b/drivers/scsi/pm8001/pm8001_ctl.c
> @@ -61,10 +61,10 @@ static ssize_t pm8001_ctl_mpi_interface_rev_show(struct device *cdev,
>  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
>
>  	if (pm8001_ha->chip_id == chip_8001) {
> -		return snprintf(buf, PAGE_SIZE, "%d\n",
> +		return sysfs_emit(buf, "%d\n",
>  			pm8001_ha->main_cfg_tbl.pm8001_tbl.interface_rev);
>  	} else {
> -		return snprintf(buf, PAGE_SIZE, "%d\n",
> +		return sysfs_emit(buf, "%d\n",
>  			pm8001_ha->main_cfg_tbl.pm80xx_tbl.interface_rev);
>  	}
>  }
> @@ -86,7 +86,7 @@ static ssize_t controller_fatal_error_show(struct device *cdev,
>  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
>  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
>
> -	return snprintf(buf, PAGE_SIZE, "%d\n",
> +	return sysfs_emit(buf, "%d\n",
>  			pm8001_ha->controller_fatal_error);
>  }
>  static DEVICE_ATTR_RO(controller_fatal_error);
> @@ -107,13 +107,13 @@ static ssize_t pm8001_ctl_fw_version_show(struct device *cdev,
>  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
>
>  	if (pm8001_ha->chip_id == chip_8001) {
> -		return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x.%02x\n",
> +		return sysfs_emit(buf, "%02x.%02x.%02x.%02x\n",
>  		(u8)(pm8001_ha->main_cfg_tbl.pm8001_tbl.firmware_rev >> 24),
>  		(u8)(pm8001_ha->main_cfg_tbl.pm8001_tbl.firmware_rev >> 16),
>  		(u8)(pm8001_ha->main_cfg_tbl.pm8001_tbl.firmware_rev >> 8),
>  		(u8)(pm8001_ha->main_cfg_tbl.pm8001_tbl.firmware_rev));
>  	} else {
> -		return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x.%02x\n",
> +		return sysfs_emit(buf, "%02x.%02x.%02x.%02x\n",
>  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.firmware_rev >> 24),
>  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.firmware_rev >> 16),
>  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.firmware_rev >> 8),
> @@ -138,7 +138,7 @@ static ssize_t pm8001_ctl_ila_version_show(struct device *cdev,
>  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
>
>  	if (pm8001_ha->chip_id != chip_8001) {
> -		return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x.%02x\n",
> +		return sysfs_emit(buf, "%02x.%02x.%02x.%02x\n",
>  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.ila_version >> 24),
>  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.ila_version >> 16),
>  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.ila_version >> 8),
> @@ -164,7 +164,7 @@ static ssize_t pm8001_ctl_inactive_fw_version_show(struct device *cdev,
>  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
>
>  	if (pm8001_ha->chip_id != chip_8001) {
> -		return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x.%02x\n",
> +		return sysfs_emit(buf, "%02x.%02x.%02x.%02x\n",
>  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.inc_fw_version >> 24),
>  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.inc_fw_version >> 16),
>  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.inc_fw_version >> 8),
> @@ -191,10 +191,10 @@ static ssize_t pm8001_ctl_max_out_io_show(struct device *cdev,
>  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
>
>  	if (pm8001_ha->chip_id == chip_8001) {
> -		return snprintf(buf, PAGE_SIZE, "%d\n",
> +		return sysfs_emit(buf, "%d\n",
>  			pm8001_ha->main_cfg_tbl.pm8001_tbl.max_out_io);
>  	} else {
> -		return snprintf(buf, PAGE_SIZE, "%d\n",
> +		return sysfs_emit(buf, "%d\n",
>  			pm8001_ha->main_cfg_tbl.pm80xx_tbl.max_out_io);
>  	}
>  }
> @@ -215,13 +215,11 @@ static ssize_t pm8001_ctl_max_devices_show(struct device *cdev,
>  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
>
>  	if (pm8001_ha->chip_id == chip_8001) {
> -		return snprintf(buf, PAGE_SIZE, "%04d\n",
> -			(u16)(pm8001_ha->main_cfg_tbl.pm8001_tbl.max_sgl >> 16)
> -			);
> +		return sysfs_emit(buf, "%04d\n",
> +			(u16)(pm8001_ha->main_cfg_tbl.pm8001_tbl.max_sgl >> 16));
>  	} else {
> -		return snprintf(buf, PAGE_SIZE, "%04d\n",
> -			(u16)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.max_sgl >> 16)
> -			);
> +		return sysfs_emit(buf, "%04d\n",
> +			(u16)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.max_sgl >> 16));
>  	}
>  }
>  static DEVICE_ATTR(max_devices, S_IRUGO, pm8001_ctl_max_devices_show, NULL);
> @@ -242,13 +240,11 @@ static ssize_t pm8001_ctl_max_sg_list_show(struct device *cdev,
>  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
>
>  	if (pm8001_ha->chip_id == chip_8001) {
> -		return snprintf(buf, PAGE_SIZE, "%04d\n",
> -			pm8001_ha->main_cfg_tbl.pm8001_tbl.max_sgl & 0x0000FFFF
> -			);
> +		return sysfs_emit(buf, "%04d\n",
> +			pm8001_ha->main_cfg_tbl.pm8001_tbl.max_sgl & 0x0000FFFF);
>  	} else {
> -		return snprintf(buf, PAGE_SIZE, "%04d\n",
> -			pm8001_ha->main_cfg_tbl.pm80xx_tbl.max_sgl & 0x0000FFFF
> -			);
> +		return sysfs_emit(buf, "%04d\n",
> +			pm8001_ha->main_cfg_tbl.pm80xx_tbl.max_sgl & 0x0000FFFF);
>  	}
>  }
>  static DEVICE_ATTR(max_sg_list, S_IRUGO, pm8001_ctl_max_sg_list_show, NULL);
> @@ -315,7 +311,7 @@ static ssize_t pm8001_ctl_host_sas_address_show(struct device *cdev,
>  	struct Scsi_Host *shost = class_to_shost(cdev);
>  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
>  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
> -	return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
> +	return sysfs_emit(buf, "0x%016llx\n",
>  			be64_to_cpu(*(__be64 *)pm8001_ha->sas_addr));
>  }
>  static DEVICE_ATTR(host_sas_address, S_IRUGO,
> @@ -336,7 +332,7 @@ static ssize_t pm8001_ctl_logging_level_show(struct device *cdev,
>  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
>  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
>
> -	return snprintf(buf, PAGE_SIZE, "%08xh\n", pm8001_ha->logging_level);
> +	return sysfs_emit(buf, "%08xh\n", pm8001_ha->logging_level);
>  }
>
>  static ssize_t pm8001_ctl_logging_level_store(struct device *cdev,
> @@ -517,7 +513,7 @@ static ssize_t event_log_size_show(struct device *cdev,
>  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
>  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
>
> -	return snprintf(buf, PAGE_SIZE, "%d\n",
> +	return sysfs_emit(buf, "%d\n",
>  		pm8001_ha->main_cfg_tbl.pm80xx_tbl.event_log_size);
>  }
>  static DEVICE_ATTR_RO(event_log_size);
> @@ -604,7 +600,7 @@ static ssize_t non_fatal_count_show(struct device *cdev,
>  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
>  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
>
> -	return snprintf(buf, PAGE_SIZE, "%08x",
> +	return sysfs_emit(buf, "%08x",
>  			pm8001_ha->non_fatal_count);
>  }
>
> @@ -884,7 +880,7 @@ static ssize_t pm8001_show_update_fw(struct device *cdev,
>  	if (pm8001_ha->fw_status != FLASH_IN_PROGRESS)
>  		pm8001_ha->fw_status = FLASH_OK;
>
> -	return snprintf(buf, PAGE_SIZE, "status=%x %s\n",
> +	return sysfs_emit(buf, "status=%x %s\n",
>  			flash_error_table[i].err_code,
>  			flash_error_table[i].reason);
>  }
> --
> 2.34.1
>