| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.12 22/45] platform/chrome: cros_ec_typec: Add DP mode check | Date | Thu, 20 May 2021 11:22:10 +0200 |
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From: Prashant Malani <pmalani@chromium.org>
[ 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@chromium.org> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Link: https://lore.kernel.org/r/20210421042108.2002-1-pmalani@chromium.org Signed-off-by: Sasha Levin <sashal@kernel.org> --- 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
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