When the PPM reports UCSI_CCI_NOT_SUPPORTED for the command, the flag remains set and no further commands are allowed to be processed until OPM acknowledges failed command completion using ACK_CC_CI. Add missing call to ucsi_acknowledge_command().
Fixes: bdc62f2bae8f ("usb: typec: ucsi: Simplified registration and I/O API") Cc: stable@vger.kernel.org Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org --- drivers/usb/typec/ucsi/ucsi.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c index 4abb752c6806..bde4f03b9aa2 100644 --- a/drivers/usb/typec/ucsi/ucsi.c +++ b/drivers/usb/typec/ucsi/ucsi.c @@ -167,8 +167,10 @@ static int ucsi_exec_command(struct ucsi *ucsi, u64 cmd) if (!(cci & UCSI_CCI_COMMAND_COMPLETE)) return -EIO;
- if (cci & UCSI_CCI_NOT_SUPPORTED) - return -EOPNOTSUPP; + if (cci & UCSI_CCI_NOT_SUPPORTED) { + ret = ucsi_acknowledge_command(ucsi); + return ret ? ret : -EOPNOTSUPP; + }
if (cci & UCSI_CCI_ERROR) { if (cmd == UCSI_GET_ERROR_STATUS)