scsi: ipr: Use kobj_to_dev()

Use kobj_to_dev() instead of open-coding it.

Link: https://lore.kernel.org/r/20220510105113.1351891-1-chi.minghao@zte.com.cn
Reported-by: Zeal Robot <zealci@zte.com.cn>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 353cf47..256ec6d 100644 (file)
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -3456,7 +3456,7 @@ static ssize_t ipr_read_trace(struct file *filp, struct kobject *kobj,
                              struct bin_attribute *bin_attr,
                              char *buf, loff_t off, size_t count)
 {
-       struct device *dev = container_of(kobj, struct device, kobj);
+       struct device *dev = kobj_to_dev(kobj);
        struct Scsi_Host *shost = class_to_shost(dev);
        struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
        unsigned long lock_flags = 0;
@@ -4182,7 +4182,7 @@ static ssize_t ipr_read_async_err_log(struct file *filep, struct kobject *kobj,
                                struct bin_attribute *bin_attr, char *buf,
                                loff_t off, size_t count)
 {
-       struct device *cdev = container_of(kobj, struct device, kobj);
+       struct device *cdev = kobj_to_dev(kobj);
        struct Scsi_Host *shost = class_to_shost(cdev);
        struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
        struct ipr_hostrcb *hostrcb;
@@ -4206,7 +4206,7 @@ static ssize_t ipr_next_async_err_log(struct file *filep, struct kobject *kobj,
                                struct bin_attribute *bin_attr, char *buf,
                                loff_t off, size_t count)
 {
-       struct device *cdev = container_of(kobj, struct device, kobj);
+       struct device *cdev = kobj_to_dev(kobj);
        struct Scsi_Host *shost = class_to_shost(cdev);
        struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
        struct ipr_hostrcb *hostrcb;
@@ -4267,7 +4267,7 @@ static ssize_t ipr_read_dump(struct file *filp, struct kobject *kobj,
                             struct bin_attribute *bin_attr,
                             char *buf, loff_t off, size_t count)
 {
-       struct device *cdev = container_of(kobj, struct device, kobj);
+       struct device *cdev = kobj_to_dev(kobj);
        struct Scsi_Host *shost = class_to_shost(cdev);
        struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
        struct ipr_dump *dump;
@@ -4456,7 +4456,7 @@ static ssize_t ipr_write_dump(struct file *filp, struct kobject *kobj,
                              struct bin_attribute *bin_attr,
                              char *buf, loff_t off, size_t count)
 {
-       struct device *cdev = container_of(kobj, struct device, kobj);
+       struct device *cdev = kobj_to_dev(kobj);
        struct Scsi_Host *shost = class_to_shost(cdev);
        struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
        int rc;