[PATCH -next v2] scsi: qla2xxx: Convert to DEFINE_SHOW_ATTRIBUTE

[Qinglang Miao]

Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.

Signed-off-by: Qinglang Miao <miaoqinglang@xxxxxxxxxx>
---
v2: based on linux-next(20200917), and can be applied to
    mainline cleanly now.

 drivers/scsi/qla2xxx/qla_dfs.c | 68 ++++------------------------------
 1 file changed, 8 insertions(+), 60 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_dfs.c b/drivers/scsi/qla2xxx/qla_dfs.c
index e62b21152..9e49b47f6 100644
--- a/drivers/scsi/qla2xxx/qla_dfs.c
+++ b/drivers/scsi/qla2xxx/qla_dfs.c
@@ -37,20 +37,7 @@ qla2x00_dfs_tgt_sess_show(struct seq_file *s, void *unused)
 	return 0;
 }
 
-static int
-qla2x00_dfs_tgt_sess_open(struct inode *inode, struct file *file)
-{
-	scsi_qla_host_t *vha = inode->i_private;
-
-	return single_open(file, qla2x00_dfs_tgt_sess_show, vha);
-}
-
-static const struct file_operations dfs_tgt_sess_ops = {
-	.open		= qla2x00_dfs_tgt_sess_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(qla2x00_dfs_tgt_sess);
 
 static int
 qla2x00_dfs_tgt_port_database_show(struct seq_file *s, void *unused)
@@ -106,20 +93,7 @@ qla2x00_dfs_tgt_port_database_show(struct seq_file *s, void *unused)
 	return 0;
 }
 
-static int
-qla2x00_dfs_tgt_port_database_open(struct inode *inode, struct file *file)
-{
-	scsi_qla_host_t *vha = inode->i_private;
-
-	return single_open(file, qla2x00_dfs_tgt_port_database_show, vha);
-}
-
-static const struct file_operations dfs_tgt_port_database_ops = {
-	.open		= qla2x00_dfs_tgt_port_database_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(qla2x00_dfs_tgt_port_database);
 
 static int
 qla_dfs_fw_resource_cnt_show(struct seq_file *s, void *unused)
@@ -154,20 +128,7 @@ qla_dfs_fw_resource_cnt_show(struct seq_file *s, void *unused)
 	return 0;
 }
 
-static int
-qla_dfs_fw_resource_cnt_open(struct inode *inode, struct file *file)
-{
-	struct scsi_qla_host *vha = inode->i_private;
-
-	return single_open(file, qla_dfs_fw_resource_cnt_show, vha);
-}
-
-static const struct file_operations dfs_fw_resource_cnt_ops = {
-	.open           = qla_dfs_fw_resource_cnt_open,
-	.read           = seq_read,
-	.llseek         = seq_lseek,
-	.release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(qla_dfs_fw_resource_cnt);
 
 static int
 qla_dfs_tgt_counters_show(struct seq_file *s, void *unused)
@@ -244,20 +205,7 @@ qla_dfs_tgt_counters_show(struct seq_file *s, void *unused)
 	return 0;
 }
 
-static int
-qla_dfs_tgt_counters_open(struct inode *inode, struct file *file)
-{
-	struct scsi_qla_host *vha = inode->i_private;
-
-	return single_open(file, qla_dfs_tgt_counters_show, vha);
-}
-
-static const struct file_operations dfs_tgt_counters_ops = {
-	.open           = qla_dfs_tgt_counters_open,
-	.read           = seq_read,
-	.llseek         = seq_lseek,
-	.release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(qla_dfs_tgt_counters);
 
 static int
 qla2x00_dfs_fce_show(struct seq_file *s, void *unused)
@@ -459,19 +407,19 @@ qla2x00_dfs_setup(scsi_qla_host_t *vha)
 
 create_nodes:
 	ha->dfs_fw_resource_cnt = debugfs_create_file("fw_resource_count",
-	    S_IRUSR, ha->dfs_dir, vha, &dfs_fw_resource_cnt_ops);
+	    S_IRUSR, ha->dfs_dir, vha, &qla_dfs_fw_resource_cnt_fops);
 
 	ha->dfs_tgt_counters = debugfs_create_file("tgt_counters", S_IRUSR,
-	    ha->dfs_dir, vha, &dfs_tgt_counters_ops);
+	    ha->dfs_dir, vha, &qla_dfs_tgt_counters_fops);
 
 	ha->tgt.dfs_tgt_port_database = debugfs_create_file("tgt_port_database",
-	    S_IRUSR,  ha->dfs_dir, vha, &dfs_tgt_port_database_ops);
+	    S_IRUSR,  ha->dfs_dir, vha, &qla2x00_dfs_tgt_port_database_fops);
 
 	ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, vha,
 	    &dfs_fce_ops);
 
 	ha->tgt.dfs_tgt_sess = debugfs_create_file("tgt_sess",
-		S_IRUSR, ha->dfs_dir, vha, &dfs_tgt_sess_ops);
+		S_IRUSR, ha->dfs_dir, vha, &qla2x00_dfs_tgt_sess_fops);
 
 	if (IS_QLA27XX(ha) || IS_QLA83XX(ha) || IS_QLA28XX(ha))
 		ha->tgt.dfs_naqp = debugfs_create_file("naqp",
-- 
2.23.0