Re: [PATCH] usb: cdc-acm: Restore CAP_BRK functionnality to CH343

[Oliver Neukum]

On 01.03.26 13:44, Marc Zyngier wrote:
> The CH343 USB/serial adapter is as buggy as it is popular (very).
> One of its quirks is that despite being capable of signalling a
> BREAK condition, it doesn't advertise it.
>
> This used to work nonetheless until 66aad7d8d3ec5 ("usb: cdc-acm:
> return correct error code on unsupported break") applied some
> reasonable restrictions, preventing breaks from being emitted on
> devices that do not advertise CAP_BRK.
>
> Add a quirk for this particular device, so that breaks can still
> be produced on some of my machines attached to my console server.
>
> Fixes: 66aad7d8d3ec5 ("usb: cdc-acm: return correct error code on unsupported break")
> Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Cc: Oliver Neukum <oneukum@xxxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Acked-by: Oliver Neukum <oneukum@xxxxxxxx>