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From: Karsten Hohmeier <linux@hohmatik.de>
To: tiwai@suse.de
Cc: linux-kernel@vger.kernel.org,
	linux-sound@vger.kernel.org,
	linux@hohmatik.de
Subject: Re: UBSAN: shift-out-of-bounds in sound/pci/ctxfi/cthw20k2.c:956:31
Date: Sat, 28 Mar 2026 20:24:17 +0100
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Hello Takashi,

I applied your one-liner with the previous patch still in place.
The module loads and kernel boots without messages.
Since the one-liner seemed SPDIF related I also tested the optical in and out and it all works.

Idk if it is the hardware or just a quirky implementation, but the SPDIF-in is grouped together with the analog inputs and without enabling those AND turning up SPDIF-in in alsamixer I don't get anything.
But I think it has always been like this.

Thumbs up from me if you want to turn this into a proper patch again.

Regards

Karsten