From ce4c8d21054ae9396cd759fe6e8157b525616dc4 Mon Sep 17 00:00:00 2001 From: "Christian A. Ehrhardt" Date: Mon, 1 Apr 2024 23:05:15 +0200 Subject: [PATCH] usb: typec: ucsi: Fix connector check on init Fix issues when initially checking for a connector change: - Use the correct connector number not the entire CCI. - Call ->read under the PPM lock. - Remove a bogus READ_ONCE. Fixes: 808a8b9e0b87 ("usb: typec: ucsi: Check for notifications after init") Cc: stable@kernel.org Signed-off-by: Christian A. Ehrhardt Reviewed-by: Heikki Krogerus Link: https://lore.kernel.org/r/20240401210515.1902048-1-lk@c--e.de Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/ucsi/ucsi.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c index 31d8a46ae5e7c..bd6ae92aa39e7 100644 --- a/drivers/usb/typec/ucsi/ucsi.c +++ b/drivers/usb/typec/ucsi/ucsi.c @@ -1736,11 +1736,13 @@ static int ucsi_init(struct ucsi *ucsi) ucsi->connector = connector; ucsi->ntfy = ntfy; + mutex_lock(&ucsi->ppm_lock); ret = ucsi->ops->read(ucsi, UCSI_CCI, &cci, sizeof(cci)); + mutex_unlock(&ucsi->ppm_lock); if (ret) return ret; - if (UCSI_CCI_CONNECTOR(READ_ONCE(cci))) - ucsi_connector_change(ucsi, cci); + if (UCSI_CCI_CONNECTOR(cci)) + ucsi_connector_change(ucsi, UCSI_CCI_CONNECTOR(cci)); return 0; -- 2.30.2