[PATCH 6.8 068/158] thunderbolt: Introduce tb_path_deactivate_hop()

Greg Kroah-Hartman
2024-04-23T21:41:32Z

From: Sanath S <Sanath.S@amd.com>

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>
---
drivers/thunderbolt/path.c | 13 +++++++++++++
drivers/thunderbolt/tb.h | 1 +
2 files changed, 14 insertions(+)

--- a/drivers/thunderbolt/path.c
+++ b/drivers/thunderbolt/path.c
@@ -446,6 +446,19 @@ static int __tb_path_deactivate_hop(stru
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;
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -1154,6 +1154,7 @@ struct tb_path *tb_path_alloc(struct tb
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);