[PATCH] platform/chrome: cros_ec: Unregister notifier in cros_ec_unregister()

[Tzung-Bi Shih <tzungbi@kernel.org>]

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
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
---
This is separated from a series (https://lore.kernel.org/chrome-platform/20250721044456.2736300-3-tzungbi@kernel.org/).

While I'm still figuring out/testing the series, it'd be better to send the
fix earlier (to catch up the upcoming merge window for example).

 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 110771a8645e..fd58781a2fb7 100644
--- a/drivers/platform/chrome/cros_ec.c
+++ b/drivers/platform/chrome/cros_ec.c
@@ -318,6 +318,9 @@ 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);
-- 
2.50.0.727.gbf7dc18ff4-goog