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Subject[PATCH 4.19 27/91] usb: typec: tcpm: free log buf memory when remove debug file
Date
From: Li Jun <jun.li@nxp.com>

commit fd5da3e2cc61b4a7c877172fdc9348c82cf6ccfc upstream.

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>

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

--- a/drivers/usb/typec/tcpm.c
+++ b/drivers/usb/typec/tcpm.c
@@ -585,6 +585,15 @@ static void tcpm_debugfs_init(struct tcp

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);
}


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