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usb: typec: ucsi: Ack unsupported commands 

commit 6b5c85ddeea77d18c4b69e3bda60e9374a20c304 upstream.

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>
Cc: stable <stable@kernel.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD
Link: https://lore.kernel.org/r/20240320073927.1641788-4-lk@c--e.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christian A. Ehrhardt 2024-03-20 08:39:24 +01:00 committed by Greg Kroah-Hartman
parent 68f57d0138
commit 5857494b50
1 changed files with 5 additions and 1 deletions
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6
drivers/usb/typec/ucsi/ucsi.c
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@ -138,8 +138,12 @@ 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)