+++ /dev/null
-From 2b5011497f01fd8669e274435bb1f536e1091f2b Mon Sep 17 00:00:00 2001
-From: Sasha Levin <sashal@kernel.org>
-Date: Fri, 31 May 2024 13:46:52 +0300
-Subject: usb: typec: ucsi: Ack also failed Get Error commands
-
-From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
-
-[ Upstream commit 8bdf8a42bca4f47646fd105a387ab6926948c7f1 ]
-
-It is possible that also the GET_ERROR command fails. If
-that happens, the command completion still needs to be
-acknowledged. Otherwise the interface will be stuck until
-it's reset.
-
-Reported-by: Ammy Yi <ammy.yi@intel.com>
-Fixes: bdc62f2bae8f ("usb: typec: ucsi: Simplified registration and I/O API")
-Cc: stable@vger.kernel.org
-Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
-Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
-Link: https://lore.kernel.org/r/20240531104653.1303519-1-heikki.krogerus@linux.intel.com
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-Signed-off-by: Sasha Levin <sashal@kernel.org>
----
- drivers/usb/typec/ucsi/ucsi.c | 7 ++++++-
- 1 file changed, 6 insertions(+), 1 deletion(-)
-
-diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
-index 144e47ed6fae3..911d774c9805a 100644
---- a/drivers/usb/typec/ucsi/ucsi.c
-+++ b/drivers/usb/typec/ucsi/ucsi.c
-@@ -153,8 +153,13 @@ static int ucsi_exec_command(struct ucsi *ucsi, u64 cmd)
- }
-
- if (cci & UCSI_CCI_ERROR) {
-- if (cmd == UCSI_GET_ERROR_STATUS)
-+ if (cmd == UCSI_GET_ERROR_STATUS) {
-+ ret = ucsi_acknowledge(ucsi, false);
-+ if (ret)
-+ return ret;
-+
- return -EIO;
-+ }
- return ucsi_read_error(ucsi);
- }
-
---
-2.43.0
-
+++ /dev/null
-From 86348adc92e8fde07a5eb41ed30a048bae529bf6 Mon Sep 17 00:00:00 2001
-From: Sasha Levin <sashal@kernel.org>
-Date: Wed, 27 Mar 2024 23:45:53 +0100
-Subject: usb: typec: ucsi: Never send a lone connector change ack
-
-From: Christian A. Ehrhardt <lk@c--e.de>
-
-[ Upstream commit de52aca4d9d56c3b2f00b638d457075914b1a227 ]
-
-Some PPM implementation do not like UCSI_ACK_CONNECTOR_CHANGE
-without UCSI_ACK_COMMAND_COMPLETE. Moreover, doing this is racy
-as it requires sending two UCSI_ACK_CC_CI commands in a row and
-the second one will be started with UCSI_CCI_ACK_COMPLETE already
-set in CCI.
-
-Bundle the UCSI_ACK_CONNECTOR_CHANGE with the UCSI_ACK_COMMAND_COMPLETE
-for the UCSI_GET_CONNECTOR_STATUS command that is sent while
-handling a connector change event.
-
-Signed-off-by: Christian A. Ehrhardt <lk@c--e.de>
-Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
-Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
-Link: https://lore.kernel.org/r/20240327224554.1772525-3-lk@c--e.de
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-Stable-dep-of: 8bdf8a42bca4 ("usb: typec: ucsi: Ack also failed Get Error commands")
-Signed-off-by: Sasha Levin <sashal@kernel.org>
----
- drivers/usb/typec/ucsi/ucsi.c | 48 +++++++++++++++--------------------
- 1 file changed, 21 insertions(+), 27 deletions(-)
-
-diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
-index 7801501837b69..144e47ed6fae3 100644
---- a/drivers/usb/typec/ucsi/ucsi.c
-+++ b/drivers/usb/typec/ucsi/ucsi.c
-@@ -49,22 +49,16 @@ static int ucsi_read_message_in(struct ucsi *ucsi, void *buf,
- return ucsi->ops->read(ucsi, UCSI_MESSAGE_IN, buf, buf_size);
- }
-
--static int ucsi_acknowledge_command(struct ucsi *ucsi)
-+static int ucsi_acknowledge(struct ucsi *ucsi, bool conn_ack)
- {
- u64 ctrl;
-
- ctrl = UCSI_ACK_CC_CI;
- ctrl |= UCSI_ACK_COMMAND_COMPLETE;
--
-- return ucsi->ops->sync_write(ucsi, UCSI_CONTROL, &ctrl, sizeof(ctrl));
--}
--
--static int ucsi_acknowledge_connector_change(struct ucsi *ucsi)
--{
-- u64 ctrl;
--
-- ctrl = UCSI_ACK_CC_CI;
-- ctrl |= UCSI_ACK_CONNECTOR_CHANGE;
-+ if (conn_ack) {
-+ clear_bit(EVENT_PENDING, &ucsi->flags);
-+ ctrl |= UCSI_ACK_CONNECTOR_CHANGE;
-+ }
-
- return ucsi->ops->sync_write(ucsi, UCSI_CONTROL, &ctrl, sizeof(ctrl));
- }
-@@ -77,7 +71,7 @@ static int ucsi_read_error(struct ucsi *ucsi)
- int ret;
-
- /* Acknowledge the command that failed */
-- ret = ucsi_acknowledge_command(ucsi);
-+ ret = ucsi_acknowledge(ucsi, false);
- if (ret)
- return ret;
-
-@@ -89,7 +83,7 @@ static int ucsi_read_error(struct ucsi *ucsi)
- if (ret)
- return ret;
-
-- ret = ucsi_acknowledge_command(ucsi);
-+ ret = ucsi_acknowledge(ucsi, false);
- if (ret)
- return ret;
-
-@@ -152,7 +146,7 @@ static int ucsi_exec_command(struct ucsi *ucsi, u64 cmd)
- return -EIO;
-
- if (cci & UCSI_CCI_NOT_SUPPORTED) {
-- if (ucsi_acknowledge_command(ucsi) < 0)
-+ if (ucsi_acknowledge(ucsi, false) < 0)
- dev_err(ucsi->dev,
- "ACK of unsupported command failed\n");
- return -EOPNOTSUPP;
-@@ -165,15 +159,15 @@ static int ucsi_exec_command(struct ucsi *ucsi, u64 cmd)
- }
-
- if (cmd == UCSI_CANCEL && cci & UCSI_CCI_CANCEL_COMPLETE) {
-- ret = ucsi_acknowledge_command(ucsi);
-+ ret = ucsi_acknowledge(ucsi, false);
- return ret ? ret : -EBUSY;
- }
-
- return UCSI_CCI_LENGTH(cci);
- }
-
--int ucsi_send_command(struct ucsi *ucsi, u64 command,
-- void *data, size_t size)
-+static int ucsi_send_command_common(struct ucsi *ucsi, u64 command,
-+ void *data, size_t size, bool conn_ack)
- {
- u8 length;
- int ret;
-@@ -192,7 +186,7 @@ int ucsi_send_command(struct ucsi *ucsi, u64 command,
- goto out;
- }
-
-- ret = ucsi_acknowledge_command(ucsi);
-+ ret = ucsi_acknowledge(ucsi, conn_ack);
- if (ret)
- goto out;
-
-@@ -201,6 +195,12 @@ int ucsi_send_command(struct ucsi *ucsi, u64 command,
- mutex_unlock(&ucsi->ppm_lock);
- return ret;
- }
-+
-+int ucsi_send_command(struct ucsi *ucsi, u64 command,
-+ void *data, size_t size)
-+{
-+ return ucsi_send_command_common(ucsi, command, data, size, false);
-+}
- EXPORT_SYMBOL_GPL(ucsi_send_command);
-
- /* -------------------------------------------------------------------------- */
-@@ -1157,7 +1157,9 @@ static void ucsi_handle_connector_change(struct work_struct *work)
- mutex_lock(&con->lock);
-
- command = UCSI_GET_CONNECTOR_STATUS | UCSI_CONNECTOR_NUMBER(con->num);
-- ret = ucsi_send_command(ucsi, command, &con->status, sizeof(con->status));
-+
-+ ret = ucsi_send_command_common(ucsi, command, &con->status,
-+ sizeof(con->status), true);
- if (ret < 0) {
- dev_err(ucsi->dev, "%s: GET_CONNECTOR_STATUS failed (%d)\n",
- __func__, ret);
-@@ -1214,14 +1216,6 @@ static void ucsi_handle_connector_change(struct work_struct *work)
- if (con->status.change & UCSI_CONSTAT_CAM_CHANGE)
- ucsi_partner_task(con, ucsi_check_altmodes, 1, 0);
-
-- mutex_lock(&ucsi->ppm_lock);
-- clear_bit(EVENT_PENDING, &con->ucsi->flags);
-- ret = ucsi_acknowledge_connector_change(ucsi);
-- mutex_unlock(&ucsi->ppm_lock);
--
-- if (ret)
-- dev_err(ucsi->dev, "%s: ACK failed (%d)", __func__, ret);
--
- out_unlock:
- mutex_unlock(&con->lock);
- }
---
-2.43.0
-