Merge commit 'v3.2.1' into rt-3.2.1-rt9v3.2.1-rt9

1 files changed, 14 insertions, 2 deletions

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index a8078d0638fa..e61d9c43e985 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -554,10 +554,18 @@ static void acm_port_down(struct acm *acm)
 
 static void acm_tty_hangup(struct tty_struct *tty)
 {
-	struct acm *acm = tty->driver_data;
-	tty_port_hangup(&acm->port);
+	struct acm *acm;
+
 	mutex_lock(&open_mutex);
+	acm = tty->driver_data;
+
+	if (!acm)
+		goto out;
+
+	tty_port_hangup(&acm->port);
 	acm_port_down(acm);
+
+out:
 	mutex_unlock(&open_mutex);
 }
 
@@ -1183,6 +1191,8 @@ made_compressed_probe:
 		i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
 		if (i < 0) {
 			kfree(acm->country_codes);
+			acm->country_codes = NULL;
+			acm->country_code_size = 0;
 			goto skip_countries;
 		}
 
@@ -1191,6 +1201,8 @@ made_compressed_probe:
 		if (i < 0) {
 			device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
 			kfree(acm->country_codes);
+			acm->country_codes = NULL;
+			acm->country_code_size = 0;
 			goto skip_countries;
 		}
 	}