thunderbolt: Introduce tb_path_deactivate_hop()

commit b35c1d7b11da8c08b14147bbe87c2c92f7a83f8b upstream.

This function can be used to clear path config space of an adapter. Make
it available for other files in this driver.

Signed-off-by: Sanath S <Sanath.S@amd.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/thunderbolt/path.c b/drivers/thunderbolt/path.c
index ee03fd75a4728f1ca10a603e0fbe1698ad0cf54b..17f7647e6a72250f212b4605b2f7baa7c3deddb7 100644 (file)
--- a/drivers/thunderbolt/path.c
+++ b/drivers/thunderbolt/path.c
@@ -446,6 +446,19 @@ static int __tb_path_deactivate_hop(struct tb_port *port, int hop_index,
        return -ETIMEDOUT;
 }
 
+/**
+ * tb_path_deactivate_hop() - Deactivate one path in path config space
+ * @port: Lane or protocol adapter
+ * @hop_index: HopID of the path to be cleared
+ *
+ * This deactivates or clears a single path config space entry at
+ * @hop_index. Returns %0 in success and negative errno otherwise.
+ */
+int tb_path_deactivate_hop(struct tb_port *port, int hop_index)
+{
+       return __tb_path_deactivate_hop(port, hop_index, true);
+}
+
 static void __tb_path_deactivate_hops(struct tb_path *path, int first_hop)
 {
        int i, res;

diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index 999d79aa43d581e031f0cbef2c9abeb434e92770..e9d255dc07e47f894e662434262a5cb3721b0245 100644 (file)
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -1100,6 +1100,7 @@ struct tb_path *tb_path_alloc(struct tb *tb, struct tb_port *src, int src_hopid,
 void tb_path_free(struct tb_path *path);
 int tb_path_activate(struct tb_path *path);
 void tb_path_deactivate(struct tb_path *path);
+int tb_path_deactivate_hop(struct tb_port *port, int hop_index);
 bool tb_path_is_invalid(struct tb_path *path);
 bool tb_path_port_on_path(const struct tb_path *path,
                          const struct tb_port *port);