From: Prashant Malani <pmalani@xxxxxxxxxxxx> [ Upstream commit c5bb32f57bf3a30ed03be51f7be0840325ba8b4a ] There are certain transitional situations where the dp_mode field in the PD_CONTROL response might not be populated with the right DP pin assignment value yet. Add a check for that to avoid sending an invalid value to the Type C mode switch. Signed-off-by: Prashant Malani <pmalani@xxxxxxxxxxxx> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20210421042108.2002-1-pmalani@xxxxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/platform/chrome/cros_ec_typec.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c index 0811562deecc..24be8f550ae0 100644 --- a/drivers/platform/chrome/cros_ec_typec.c +++ b/drivers/platform/chrome/cros_ec_typec.c @@ -483,6 +483,11 @@ static int cros_typec_enable_dp(struct cros_typec_data *typec, return -ENOTSUPP; } + if (!pd_ctrl->dp_mode) { + dev_err(typec->dev, "No valid DP mode provided.\n"); + return -EINVAL; + } + /* Status VDO. */ dp_data.status = DP_STATUS_ENABLED; if (port->mux_flags & USB_PD_MUX_HPD_IRQ) -- 2.30.2
