From f094e4f358c2f9f0a46dc777f64ed7794f73d283 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@suse.de>
Date: Thu, 26 Apr 2007 00:12:01 -0700
Subject: [PATCH] USB: sierra: add more checks on shutdown
This should help with any potential NULL pointer usages as reported by a
few users.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/usb/serial/sierra.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index 4865aff892e8..644607de4c11 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -577,7 +577,12 @@ static void sierra_shutdown(struct usb_serial *serial)
/* Stop reading/writing urbs */
for (i = 0; i < serial->num_ports; ++i) {
port = serial->port[i];
+ if (!port)
+ continue;
portdata = usb_get_serial_port_data(port);
+ if (!portdata)
+ continue;
+
for (j = 0; j < N_IN_URB; j++)
usb_unlink_urb(portdata->in_urbs[j]);
for (j = 0; j < N_OUT_URB; j++)
@@ -587,7 +592,11 @@ static void sierra_shutdown(struct usb_serial *serial)
/* Now free them */
for (i = 0; i < serial->num_ports; ++i) {
port = serial->port[i];
+ if (!port)
+ continue;
portdata = usb_get_serial_port_data(port);
+ if (!portdata)
+ continue;
for (j = 0; j < N_IN_URB; j++) {
if (portdata->in_urbs[j]) {
@@ -606,6 +615,8 @@ static void sierra_shutdown(struct usb_serial *serial)
/* Now free per port private data */
for (i = 0; i < serial->num_ports; i++) {
port = serial->port[i];
+ if (!port)
+ continue;
kfree(usb_get_serial_port_data(port));
}
}
--
2.20.1