thunderbolt: Make tb_find_port() available to other files

We will be needing this when adding initial USB4 support so make it
available to other files in the driver as well. We also rename it to
tb_switch_find_port() to follow conventions used in switch.c.

No functional changes.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://lore.kernel.org/r/20191217123345.31850-2-mika.westerberg@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 22 insertions, 20 deletions

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index ca86a8e09c77..9c72521cb298 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -2517,6 +2517,24 @@ struct tb_switch *tb_switch_find_by_route(struct tb *tb, u64 route)
 	return NULL;
 }
 
+/**
+ * tb_switch_find_port() - return the first port of @type on @sw or NULL
+ * @sw: Switch to find the port from
+ * @type: Port type to look for
+ */
+struct tb_port *tb_switch_find_port(struct tb_switch *sw,
+				    enum tb_port_type type)
+{
+	struct tb_port *port;
+
+	tb_switch_for_each_port(sw, port) {
+		if (port->config.type == type)
+			return port;
+	}
+
+	return NULL;
+}
+
 void tb_switch_exit(void)
 {
 	ida_destroy(&nvm_ida);
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index ea8727f769d6..54085f67810a 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -339,24 +339,6 @@ static void tb_free_unplugged_children(struct tb_switch *sw)
 }
 
 /**
- * tb_find_port() - return the first port of @type on @sw or NULL
- * @sw: Switch to find the port from
- * @type: Port type to look for
- */
-static struct tb_port *tb_find_port(struct tb_switch *sw,
-				    enum tb_port_type type)
-{
-	struct tb_port *port;
-
-	tb_switch_for_each_port(sw, port) {
-		if (port->config.type == type)
-			return port;
-	}
-
-	return NULL;
-}
-
-/**
  * tb_find_unused_port() - return the first inactive port on @sw
  * @sw: Switch to find the port on
  * @type: Port type to look for
@@ -586,7 +568,7 @@ static int tb_tunnel_pci(struct tb *tb, struct tb_switch *sw)
 	struct tb_switch *parent_sw;
 	struct tb_tunnel *tunnel;
 
-	up = tb_find_port(sw, TB_TYPE_PCIE_UP);
+	up = tb_switch_find_port(sw, TB_TYPE_PCIE_UP);
 	if (!up)
 		return 0;
 
@@ -624,7 +606,7 @@ static int tb_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd)
 
 	sw = tb_to_switch(xd->dev.parent);
 	dst_port = tb_port_at(xd->route, sw);
-	nhi_port = tb_find_port(tb->root_switch, TB_TYPE_NHI);
+	nhi_port = tb_switch_find_port(tb->root_switch, TB_TYPE_NHI);
 
 	mutex_lock(&tb->lock);
 	tunnel = tb_tunnel_alloc_dma(tb, nhi_port, dst_port, xd->transmit_ring,
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index ec851f20c571..ade1c7c77db1 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -533,6 +533,8 @@ void tb_switch_suspend(struct tb_switch *sw);
 int tb_switch_resume(struct tb_switch *sw);
 int tb_switch_reset(struct tb *tb, u64 route);
 void tb_sw_set_unplugged(struct tb_switch *sw);
+struct tb_port *tb_switch_find_port(struct tb_switch *sw,
+				    enum tb_port_type type);
 struct tb_switch *tb_switch_find_by_link_depth(struct tb *tb, u8 link,
 					       u8 depth);
 struct tb_switch *tb_switch_find_by_uuid(struct tb *tb, const uuid_t *uuid);