[PATCH 5.10.y 4/4] platform/chrome: cros_ec: Unregister notifier in cros_ec_unregister()

[Sasha Levin <sashal@kernel.org>]

From: Tzung-Bi Shih <tzungbi@kernel.org>

[ Upstream commit e2374953461947eee49f69b3e3204ff080ef31b1 ]

The blocking notifier is registered in cros_ec_register(); however, it
isn't unregistered in cros_ec_unregister().

Fix it.

Fixes: 42cd0ab476e2 ("platform/chrome: cros_ec: Query EC protocol version if EC transitions between RO/RW")
Cc: stable@vger.kernel.org
Reviewed-by: Benson Leung <bleung@chromium.org>
Link: https://lore.kernel.org/r/20250722120513.234031-1-tzungbi@kernel.org
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/platform/chrome/cros_ec.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/platform/chrome/cros_ec.c b/drivers/platform/chrome/cros_ec.c
index ec6ebb250ba3..a0b6cec9bfee 100644
--- a/drivers/platform/chrome/cros_ec.c
+++ b/drivers/platform/chrome/cros_ec.c
@@ -292,6 +292,9 @@ EXPORT_SYMBOL(cros_ec_register);
  */
 void cros_ec_unregister(struct cros_ec_device *ec_dev)
 {
+	if (ec_dev->mkbp_event_supported)
+		blocking_notifier_chain_unregister(&ec_dev->event_notifier,
+						   &ec_dev->notifier_ready);
 	platform_device_unregister(ec_dev->pd);
 	platform_device_unregister(ec_dev->ec);
 	mutex_destroy(&ec_dev->lock);
-- 
2.50.1