Re: [PATCH 3/5] usb: typec: ucsi: Ack unsupported commands

Heikki Krogerus
2024-03-22T10:04:19Z

On Wed, Mar 20, 2024 at 08:39:24AM +0100, Christian A. Ehrhardt wrote:
> If a command completes the OPM must send an ack. This applies
> to unsupported commands, too.
>
> Send the required ACK for unsupported commands.
>
> Signed-off-by: Christian A. Ehrhardt <lk@c--e.de>

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

> ---
> drivers/usb/typec/ucsi/ucsi.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
> index dceeed207569..63f340dbd867 100644
> --- a/drivers/usb/typec/ucsi/ucsi.c
> +++ b/drivers/usb/typec/ucsi/ucsi.c
> @@ -151,8 +151,12 @@ static int ucsi_exec_command(struct ucsi *ucsi, u64 cmd)
> if (!(cci & UCSI_CCI_COMMAND_COMPLETE))
> return -EIO;
>
> - if (cci & UCSI_CCI_NOT_SUPPORTED)
> + if (cci & UCSI_CCI_NOT_SUPPORTED) {
> + if (ucsi_acknowledge_command(ucsi) < 0)
> + dev_err(ucsi->dev,
> + "ACK of unsupported command failed\n");
> return -EOPNOTSUPP;
> + }
>
> if (cci & UCSI_CCI_ERROR) {
> if (cmd == UCSI_GET_ERROR_STATUS)
> --
> 2.40.1

--
heikki