netdev - [PATCH v2 6/9] thunderbolt: Make tb_switch_find

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Date:   Tue, 17 Dec 2019 15:33:42 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     linux-usb@...r.kernel.org
Cc:     Andreas Noever <andreas.noever@...il.com>,
        Michael Jamet <michael.jamet@...el.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Yehezkel Bernat <YehezkelShB@...il.com>,
        Rajmohan Mani <rajmohan.mani@...el.com>,
        Nicholas Johnson <nicholas.johnson-opensource@...look.com.au>,
        Lukas Wunner <lukas@...ner.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Mario.Limonciello@...l.com,
        Anthony Wong <anthony.wong@...onical.com>,
        Oliver Neukum <oneukum@...e.com>,
        Christian Kellner <ckellner@...hat.com>,
        "David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 6/9] thunderbolt: Make tb_switch_find_cap() available to other files

From: Rajmohan Mani <rajmohan.mani@...el.com>

We need to find switch capabilities in order to implement TMU support so
make it available to other files as well.

Signed-off-by: Rajmohan Mani <rajmohan.mani@...el.com>
Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
---
 drivers/thunderbolt/cap.c | 11 ++++++++++-
 drivers/thunderbolt/tb.h  |  1 +
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/thunderbolt/cap.c b/drivers/thunderbolt/cap.c
index fdd77bb4628d..19db6cdc5b70 100644
--- a/drivers/thunderbolt/cap.c
+++ b/drivers/thunderbolt/cap.c
@@ -113,7 +113,16 @@ int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap)
 	return ret;
 }
 
-static int tb_switch_find_cap(struct tb_switch *sw, enum tb_switch_cap cap)
+/**
+ * tb_switch_find_cap() - Find switch capability
+ * @sw Switch to find the capability for
+ * @cap: Capability to look
+ *
+ * Returns offset to start of capability or %-ENOENT if no such
+ * capability was found. Negative errno is returned if there was an
+ * error.
+ */
+int tb_switch_find_cap(struct tb_switch *sw, enum tb_switch_cap cap)
 {
 	int offset = sw->config.first_cap_offset;
 
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index 0158f0e9858c..28dd0e0b1579 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -685,6 +685,7 @@ struct tb_port *tb_next_port_on_path(struct tb_port *start, struct tb_port *end,
 				     struct tb_port *prev);
 
 int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec);
+int tb_switch_find_cap(struct tb_switch *sw, enum tb_switch_cap cap);
 int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap);
 bool tb_port_is_enabled(struct tb_port *port);
 
-- 
2.24.0