From: Jameson Thies jthies@google.com
[ Upstream commit 23379a17334fc24c4a9cbd9967d33dcd9323cc7c ]
The ucsi_psy_get_current_max function defaults to 0.1A when it is not clear how much current the partner device can support. But this does not check the port is connected, and will report 0.1A max current when nothing is connected. Update ucsi_psy_get_current_max to report 0A when there is no connection.
Fixes: af833e7f7db3 ("usb: typec: ucsi: psy: Set current max to 100mA for BC 1.2 and Default") Cc: stable@vger.kernel.org Signed-off-by: Jameson Thies jthies@google.com Reviewed-by: Benson Leung bleung@chromium.org Reviewed-by: Heikki Krogerus heikki.krogerus@linux.intel.com Reviewed-by: Sebastian Reichel sebastian.reichel@collabora.com Tested-by: Kenneth R. Crudup kenny@panix.com Rule: add Link: https://lore.kernel.org/stable/20251017000051.2094101-1-jthies%40google.com Link: https://patch.msgid.link/20251106011446.2052583-1-jthies@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org [ adapted UCSI_CONSTAT() macro to direct flag access ] Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/typec/ucsi/psy.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/usb/typec/ucsi/psy.c b/drivers/usb/typec/ucsi/psy.c index 9447a50716ec1..7f176382b1a0f 100644 --- a/drivers/usb/typec/ucsi/psy.c +++ b/drivers/usb/typec/ucsi/psy.c @@ -145,6 +145,11 @@ static int ucsi_psy_get_current_max(struct ucsi_connector *con, { u32 pdo;
+ if (!(con->status.flags & UCSI_CONSTAT_CONNECTED)) { + val->intval = 0; + return 0; + } + switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) { case UCSI_CONSTAT_PWR_OPMODE_PD: if (con->num_pdos > 0) {