linux-kernel - [PATCH] usb: typec: mux: do not return on EOPNOTSUPP in {mux, switch}

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Message-Id: <20250404-ml-topic-typec-mux-v1-1-22c0526381ba@pengutronix.de>
Date: Fri, 04 Apr 2025 00:21:01 +0200
From: Michael Grzeschik <m.grzeschik@...gutronix.de>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org, 
 kernel@...gutronix.de, Michael Grzeschik <m.grzeschik@...gutronix.de>
Subject: [PATCH] usb: typec: mux: do not return on EOPNOTSUPP in {mux,
 switch}_set

Since the typec connectors can have many muxes or switches for different
lanes (sbu, usb2, usb3) going into different modal states (usb2, usb3,
audio, debug) all of them will be called on typec_switch_set and
typec_mux_set. But not all of them will be handling the expected mode.

If one of the mux or switch will come back with EOPTNOSUPP this is no
reason to stop running through the next ones. Therefor we skip this
particular error value and continue calling the next.

Signed-off-by: Michael Grzeschik <m.grzeschik@...gutronix.de>
---
 drivers/usb/typec/mux.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/typec/mux.c b/drivers/usb/typec/mux.c
index 49926d6e72c71..182c902c42f61 100644
--- a/drivers/usb/typec/mux.c
+++ b/drivers/usb/typec/mux.c
@@ -214,7 +214,7 @@ int typec_switch_set(struct typec_switch *sw,
 		sw_dev = sw->sw_devs[i];
 
 		ret = sw_dev->set(sw_dev, orientation);
-		if (ret)
+		if (ret && ret != -EOPNOTSUPP)
 			return ret;
 	}
 
@@ -378,7 +378,7 @@ int typec_mux_set(struct typec_mux *mux, struct typec_mux_state *state)
 		mux_dev = mux->mux_devs[i];
 
 		ret = mux_dev->set(mux_dev, state);
-		if (ret)
+		if (ret && ret != -EOPNOTSUPP)
 			return ret;
 	}
 

---
base-commit: a1b5bd45d4ee58af4f56e49497b8c3db96d8f8a3
change-id: 20250404-ml-topic-typec-mux-5b9b014f1dbd

Best regards,
-- 
Michael Grzeschik <m.grzeschik@...gutronix.de>