IB/core: Replace ib_query_gid with rdma_get_gid_attr

These call sites have a use of ib_query_gid with a simple lifetime for the
struct gid_attr pointer, with an easy conversion.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/core/sysfs.c

@@ -42,6 +42,7 @@
 
 #include <rdma/ib_mad.h>
 #include <rdma/ib_pma.h>
+#include <rdma/ib_cache.h>
 
 struct ib_port;
 
@@ -346,7 +347,7 @@ static struct attribute *port_default_attrs[] = {
 	NULL
 };
 
-static size_t print_ndev(struct ib_gid_attr *gid_attr, char *buf)
+static size_t print_ndev(const struct ib_gid_attr *gid_attr, char *buf)
 {
 	if (!gid_attr->ndev)
 		return -EINVAL;
@@ -354,33 +355,26 @@ static size_t print_ndev(struct ib_gid_attr *gid_attr, char *buf)
 	return sprintf(buf, "%s\n", gid_attr->ndev->name);
 }
 
-static size_t print_gid_type(struct ib_gid_attr *gid_attr, char *buf)
+static size_t print_gid_type(const struct ib_gid_attr *gid_attr, char *buf)
 {
 	return sprintf(buf, "%s\n", ib_cache_gid_type_str(gid_attr->gid_type));
 }
 
-static ssize_t _show_port_gid_attr(struct ib_port *p,
-				   struct port_attribute *attr,
-				   char *buf,
-				   size_t (*print)(struct ib_gid_attr *gid_attr,
-						   char *buf))
+static ssize_t _show_port_gid_attr(
+	struct ib_port *p, struct port_attribute *attr, char *buf,
+	size_t (*print)(const struct ib_gid_attr *gid_attr, char *buf))
 {
 	struct port_table_attribute *tab_attr =
 		container_of(attr, struct port_table_attribute, attr);
-	union ib_gid gid;
-	struct ib_gid_attr gid_attr = {};
+	const struct ib_gid_attr *gid_attr;
 	ssize_t ret;
 
-	ret = ib_query_gid(p->ibdev, p->port_num, tab_attr->index, &gid,
-			   &gid_attr);
-	if (ret)
-		goto err;
+	gid_attr = rdma_get_gid_attr(p->ibdev, p->port_num, tab_attr->index);
+	if (IS_ERR(gid_attr))
+		return PTR_ERR(gid_attr);
 
-	ret = print(&gid_attr, buf);
-
-err:
-	if (gid_attr.ndev)
-		dev_put(gid_attr.ndev);
+	ret = print(gid_attr, buf);
+	rdma_put_gid_attr(gid_attr);
 	return ret;
 }
 
@@ -389,26 +383,28 @@ static ssize_t show_port_gid(struct ib_port *p, struct port_attribute *attr,
 {
 	struct port_table_attribute *tab_attr =
 		container_of(attr, struct port_table_attribute, attr);
-	union ib_gid *pgid;
-	union ib_gid gid;
+	const struct ib_gid_attr *gid_attr;
 	ssize_t ret;
 
-	ret = ib_query_gid(p->ibdev, p->port_num, tab_attr->index, &gid, NULL);
-
-	/* If reading GID fails, it is likely due to GID entry being empty
-	 * (invalid) or reserved GID in the table.
-	 * User space expects to read GID table entries as long as it given
-	 * index is within GID table size.
-	 * Administrative/debugging tool fails to query rest of the GID entries
-	 * if it hits error while querying a GID of the given index.
-	 * To avoid user space throwing such error on fail to read gid, return
-	 * zero GID as before. This maintains backward compatibility.
+	gid_attr = rdma_get_gid_attr(p->ibdev, p->port_num, tab_attr->index);
+	if (IS_ERR(gid_attr)) {
+		const union ib_gid zgid = {};
+
+		/* If reading GID fails, it is likely due to GID entry being
+		 * empty (invalid) or reserved GID in the table.  User space
+		 * expects to read GID table entries as long as it given index
+		 * is within GID table size.  Administrative/debugging tool
+		 * fails to query rest of the GID entries if it hits error
+		 * while querying a GID of the given index.  To avoid user
+		 * space throwing such error on fail to read gid, return zero
+		 * GID as before. This maintains backward compatibility.
 		 */
-	if (ret)
-		pgid = &zgid;
-	else
-		pgid = &gid;
-	return sprintf(buf, "%pI6\n", pgid->raw);
+		return sprintf(buf, "%pI6\n", zgid.raw);
+	}
+
+	ret = sprintf(buf, "%pI6\n", gid_attr->gid.raw);
+	rdma_put_gid_attr(gid_attr);
+	return ret;
 }
 
 static ssize_t show_port_gid_attr_ndev(struct ib_port *p,