From fd5da3e2cc61b4a7c877172fdc9348c82cf6ccfc Mon Sep 17 00:00:00 2001
From: Li Jun <jun.li@nxp.com>
Date: Wed, 17 Jul 2019 16:06:45 +0800
Subject: [PATCH] usb: typec: tcpm: free log buf memory when remove debug file
Git-commit: fd5da3e2cc61b4a7c877172fdc9348c82cf6ccfc
Patch-mainline: v5.3-rc4
References: bsc#1111666

The logbuffer memory should be freed when remove debug file.

Cc: stable@vger.kernel.org # v4.15+
Fixes: 4b4e02c83167 ("typec: tcpm: Move out of staging")
Signed-off-by: Li Jun <jun.li@nxp.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20190717080646.30421-1-jun.li@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/usb/typec/tcpm/tcpm.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 77f71f602f73..7b6497c1031e 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -587,6 +587,15 @@ static void tcpm_debugfs_init(struct tcpm_port *port)
 
 static void tcpm_debugfs_exit(struct tcpm_port *port)
 {
+	int i;
+
+	mutex_lock(&port->logbuffer_lock);
+	for (i = 0; i < LOG_BUFFER_ENTRIES; i++) {
+		kfree(port->logbuffer[i]);
+		port->logbuffer[i] = NULL;
+	}
+	mutex_unlock(&port->logbuffer_lock);
+
 	debugfs_remove(port->dentry);
 }
 
-- 
2.16.4