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@xxxxxxxxxxxxxxx
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
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)
--
2.39.2
