This is a note to let you know that I've just added the patch titled
usb: typec: ucsi: Ack unsupported commands
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-typec-ucsi-ack-unsupported-commands.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6b5c85ddeea77d18c4b69e3bda60e9374a20c304 Mon Sep 17 00:00:00 2001
From: "Christian A. Ehrhardt" <lk@xxxxxxx>
Date: Wed, 20 Mar 2024 08:39:24 +0100
Subject: usb: typec: ucsi: Ack unsupported commands
From: Christian A. Ehrhardt <lk@xxxxxxx>
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@xxxxxxx>
Cc: stable <stable@xxxxxxxxxx>
Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Tested-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx> # on SM8550-QRD
Link: https://lore.kernel.org/r/20240320073927.1641788-4-lk@xxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/typec/ucsi/ucsi.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -138,8 +138,12 @@ static int ucsi_exec_command(struct ucsi
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)
Patches currently in stable-queue which might be from lk@xxxxxxx are
queue-6.6/usb-typec-ucsi-check-for-notifications-after-init.patch
queue-6.6/usb-typec-ucsi_acpi-refactor-and-fix-dell-quirk.patch
queue-6.6/usb-typec-ucsi-clear-event_pending-under-ppm-lock.patch
queue-6.6/usb-typec-ucsi-ack-unsupported-commands.patch
queue-6.6/usb-typec-ucsi-clear-ucsi_cci_reset_complete-before-reset.patch
