2 files changed, 4 insertions, 3 deletions

diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h
index 3737f7218f51..7bb6148d990f 100644
--- a/include/linux/miscdevice.h
+++ b/include/linux/miscdevice.h
@@ -23,6 +23,7 @@
 #define TEMP_MINOR              131     /* Temperature Sensor */
 #define RTC_MINOR               135
 #define EFI_RTC_MINOR           136     /* EFI Time services */
+#define VHCI_MINOR              137
 #define SUN_OPENPROM_MINOR      139
 #define DMAPI_MINOR             140     /* DMAPI */
 #define NVRAM_MINOR             144
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 90b4fdc8a61f..4781d7b27dd3 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -518,9 +518,9 @@ extern void tty_port_put(struct tty_port *port);
 
 static inline struct tty_port *tty_port_get(struct tty_port *port)
 {
-        if (port)
-                kref_get(&port->kref);
-        return port;
+        if (port && kref_get_unless_zero(&port->kref))
+                return port;
+        return NULL;
 }
 
 /* If the cts flow control is enabled, return true. */