6.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jameson Thies <jthies@xxxxxxxxxx> [ Upstream commit c313a44ac9cda60431bdc7dcdb4b135eaef31785 ] Providing the number of known alternate modes allows user space to determine when device registration has completed. Always register a number of known alternate modes for the partner and cable plug, even when the number of supported alternate modes is 0. Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> Reviewed-by: Benson Leung <bleung@xxxxxxxxxxxx> Signed-off-by: Jameson Thies <jthies@xxxxxxxxxx> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> Link: https://lore.kernel.org/r/20240510201244.2968152-5-jthies@xxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Stable-dep-of: 87eb3cb4ec61 ("usb: typec: ucsi: Fix cable registration") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/usb/typec/ucsi/ucsi.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c index 45e91d065b3b..7a127ea57b5a 100644 --- a/drivers/usb/typec/ucsi/ucsi.c +++ b/drivers/usb/typec/ucsi/ucsi.c @@ -817,10 +817,11 @@ static int ucsi_check_altmodes(struct ucsi_connector *con) /* Ignoring the errors in this case. */ if (con->partner_altmode[0]) { num_partner_am = ucsi_get_num_altmode(con->partner_altmode); - if (num_partner_am > 0) - typec_partner_set_num_altmodes(con->partner, num_partner_am); + typec_partner_set_num_altmodes(con->partner, num_partner_am); ucsi_altmode_update_active(con); return 0; + } else { + typec_partner_set_num_altmodes(con->partner, 0); } return ret; @@ -1143,7 +1144,7 @@ static int ucsi_check_connection(struct ucsi_connector *con) static int ucsi_check_cable(struct ucsi_connector *con) { u64 command; - int ret; + int ret, num_plug_am; if (con->cable) return 0; @@ -1177,6 +1178,13 @@ static int ucsi_check_cable(struct ucsi_connector *con) return ret; } + if (con->plug_altmode[0]) { + num_plug_am = ucsi_get_num_altmode(con->plug_altmode); + typec_plug_set_num_altmodes(con->plug, num_plug_am); + } else { + typec_plug_set_num_altmodes(con->plug, 0); + } + return 0; } -- 2.43.0
