[PATCH] platform/chrome: cros_ec_typec: Init mutex in Thunderbolt registration

[Tzung-Bi Shih]

cros_typec_register_thunderbolt() missed initializing the `adata->lock`
mutex.  This leads to a NULL dereference when the mutex is later
acquired (e.g. in cros_typec_altmode_work()).

Initialize the mutex in cros_typec_register_thunderbolt() to fix the
issue.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: 3b00be26b16a ("platform/chrome: cros_ec_typec: Thunderbolt support")
Signed-off-by: Tzung-Bi Shih <tzungbi@xxxxxxxxxx>
---
 drivers/platform/chrome/cros_typec_altmode.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/platform/chrome/cros_typec_altmode.c b/drivers/platform/chrome/cros_typec_altmode.c
index 557340b53af0..66c546bf89b5 100644
--- a/drivers/platform/chrome/cros_typec_altmode.c
+++ b/drivers/platform/chrome/cros_typec_altmode.c
@@ -359,6 +359,7 @@ cros_typec_register_thunderbolt(struct cros_typec_port *port,
 	}
 
 	INIT_WORK(&adata->work, cros_typec_altmode_work);
+	mutex_init(&adata->lock);
 	adata->alt = alt;
 	adata->port = port;
 	adata->ap_mode_entry = true;
-- 
2.54.0.545.g6539524ca2-goog