1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 45975b4984ea..ff75a3589e7e 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -35,6 +35,7 @@
 #include <linux/serial.h>
 #include <linux/usb.h>
 #include <linux/usb/serial.h>
+#include <linux/kfifo.h>
 #include "pl2303.h"
 
 /*
@@ -625,6 +626,8 @@ static void port_release(struct device *dev)
         usb_free_urb(port->write_urb);
         usb_free_urb(port->interrupt_in_urb);
         usb_free_urb(port->interrupt_out_urb);
+        if (!IS_ERR(port->write_fifo) && port->write_fifo)
+                kfifo_free(port->write_fifo);
         kfree(port->bulk_in_buffer);
         kfree(port->bulk_out_buffer);
         kfree(port->interrupt_in_buffer);
@@ -964,6 +967,10 @@ int usb_serial_probe(struct usb_interface *interface,
                         dev_err(&interface->dev, "No free urbs available\n");
                         goto probe_error;
                 }
+                port->write_fifo = kfifo_alloc(PAGE_SIZE, GFP_KERNEL,
+                        &port->lock);
+                if (IS_ERR(port->write_fifo))
+                        goto probe_error;
                 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
                 port->bulk_out_size = buffer_size;
                 port->bulk_out_endpointAddress = endpoint->bEndpointAddress;