RDMA: Convert sysfs kobject * show functions to use sysfs_emit()

Done with cocci script:

@@
identifier k_show;
identifier arg1, arg2, arg3;
@@
ssize_t k_show(struct kobject *
-	arg1
+	kobj
	, struct kobj_attribute *
-	arg2
+	attr
	, char *
-	arg3
+	buf
	)
{
	...
(
-	arg1
+	kobj
|
-	arg2
+	attr
|
-	arg3
+	buf
)
	...
}

@@
identifier k_show;
identifier kobj, attr, buf;
@@

ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	<...
	return
-	sprintf(buf,
+	sysfs_emit(buf,
	...);
	...>
}

@@
identifier k_show;
identifier kobj, attr, buf;
@@

ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	<...
	return
-	snprintf(buf, PAGE_SIZE,
+	sysfs_emit(buf,
	...);
	...>
}

@@
identifier k_show;
identifier kobj, attr, buf;
@@

ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	<...
	return
-	scnprintf(buf, PAGE_SIZE,
+	sysfs_emit(buf,
	...);
	...>
}

@@
identifier k_show;
identifier kobj, attr, buf;
expression chr;
@@

ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	<...
	return
-	strcpy(buf, chr);
+	sysfs_emit(buf, chr);
	...>
}

@@
identifier k_show;
identifier kobj, attr, buf;
identifier len;
@@

ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	<...
	len =
-	sprintf(buf,
+	sysfs_emit(buf,
	...);
	...>
	return len;
}

@@
identifier k_show;
identifier kobj, attr, buf;
identifier len;
@@

ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	<...
	len =
-	snprintf(buf, PAGE_SIZE,
+	sysfs_emit(buf,
	...);
	...>
	return len;
}

@@
identifier k_show;
identifier kobj, attr, buf;
identifier len;
@@

ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	<...
	len =
-	scnprintf(buf, PAGE_SIZE,
+	sysfs_emit(buf,
	...);
	...>
	return len;
}

@@
identifier k_show;
identifier kobj, attr, buf;
identifier len;
@@

ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	<...
-	len += scnprintf(buf + len, PAGE_SIZE - len,
+	len += sysfs_emit_at(buf, len,
	...);
	...>
	return len;
}

@@
identifier k_show;
identifier kobj, attr, buf;
expression chr;
@@

ssize_t k_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	...
-	strcpy(buf, chr);
-	return strlen(buf);
+	return sysfs_emit(buf, chr);
}

Link: https://lore.kernel.org/r/7761c1efaebb96c432c85171d58405c25a824ccd.1602122880.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

1 files changed, 4 insertions, 8 deletions

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
index 07fbb063555d..b7c1b37ed9a8 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
@@ -27,11 +27,9 @@ static struct kobj_type ktype = {
 };
 
 static ssize_t rtrs_srv_disconnect_show(struct kobject *kobj,
-					 struct kobj_attribute *attr,
-					 char *page)
+					struct kobj_attribute *attr, char *buf)
 {
-	return scnprintf(page, PAGE_SIZE, "Usage: echo 1 > %s\n",
-			 attr->attr.name);
+	return sysfs_emit(buf, "Usage: echo 1 > %s\n", attr->attr.name);
 }
 
 static ssize_t rtrs_srv_disconnect_store(struct kobject *kobj,
@@ -72,8 +70,7 @@ static ssize_t rtrs_srv_hca_port_show(struct kobject *kobj,
 	sess = container_of(kobj, typeof(*sess), kobj);
 	usr_con = sess->s.con[0];
 
-	return scnprintf(page, PAGE_SIZE, "%u\n",
-			 usr_con->cm_id->port_num);
+	return sysfs_emit(page, "%u\n", usr_con->cm_id->port_num);
 }
 
 static struct kobj_attribute rtrs_srv_hca_port_attr =
@@ -87,8 +84,7 @@ static ssize_t rtrs_srv_hca_name_show(struct kobject *kobj,
 
 	sess = container_of(kobj, struct rtrs_srv_sess, kobj);
 
-	return scnprintf(page, PAGE_SIZE, "%s\n",
-			 sess->s.dev->ib_dev->name);
+	return sysfs_emit(page, "%s\n", sess->s.dev->ib_dev->name);
 }
 
 static struct kobj_attribute rtrs_srv_hca_name_attr =