From: GONG Ruiqi <gongruiqi1@huawei.com>
Date: Tue, 7 Jan 2025 01:57:50 +0000 (+0800)
Subject: usb: typec: fix pm usage counter imbalance in ucsi_ccg_sync_control()
X-Git-Tag: v6.13-rc7~5^2~1
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b0e525d7a22ea350e75e2aec22e47fcfafa4cacd;p=thirdparty%2Flinux.git

usb: typec: fix pm usage counter imbalance in ucsi_ccg_sync_control()

The error handling for the case `con_index == 0` should involve dropping
the pm usage counter, as ucsi_ccg_sync_control() gets it at the
beginning. Fix it.

Cc: stable <stable@kernel.org>
Fixes: e56aac6e5a25 ("usb: typec: fix potential array underflow in ucsi_ccg_sync_control()")
Signed-off-by: GONG Ruiqi <gongruiqi1@huawei.com>
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20250107015750.2778646-1-gongruiqi1@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/typec/ucsi/ucsi_ccg.c b/drivers/usb/typec/ucsi/ucsi_ccg.c
index fcb8e61136cfd..740171f24ef9f 100644
--- a/drivers/usb/typec/ucsi/ucsi_ccg.c
+++ b/drivers/usb/typec/ucsi/ucsi_ccg.c
@@ -646,7 +646,7 @@ static int ucsi_ccg_sync_control(struct ucsi *ucsi, u64 command)
 			UCSI_CMD_CONNECTOR_MASK;
 		if (con_index == 0) {
 			ret = -EINVAL;
-			goto unlock;
+			goto err_put;
 		}
 		con = &uc->ucsi->connector[con_index - 1];
 		ucsi_ccg_update_set_new_cam_cmd(uc, con, &command);
@@ -654,8 +654,8 @@ static int ucsi_ccg_sync_control(struct ucsi *ucsi, u64 command)
 
 	ret = ucsi_sync_control_common(ucsi, command);
 
+err_put:
 	pm_runtime_put_sync(uc->dev);
-unlock:
 	mutex_unlock(&uc->lock);
 
 	return ret;