USB: mxu11x0: fix memory leak in port-probe error path

Fix memory leak in port-probe error path by verifying the interrupt-in
urb before allocating the private data.

Signed-off-by: Johan Hovold <johan@kernel.org>

diff --git a/drivers/usb/serial/mxu11x0.c b/drivers/usb/serial/mxu11x0.c
index 8884ca2..89426c3 100644 (file)
--- a/drivers/usb/serial/mxu11x0.c
+++ b/drivers/usb/serial/mxu11x0.c
@@ -333,7 +333,11 @@ static int mxu1_port_probe(struct usb_serial_port *port)
 {
        struct mxu1_port *mxport;
        struct mxu1_device *mxdev;
-       struct urb *urb;
+
+       if (!port->interrupt_in_urb) {
+               dev_err(&port->dev, "no interrupt urb\n");
+               return -ENODEV;
+       }
 
        mxport = kzalloc(sizeof(struct mxu1_port), GFP_KERNEL);
        if (!mxport)
@@ -344,12 +348,6 @@ static int mxu1_port_probe(struct usb_serial_port *port)
 
        mxdev = usb_get_serial_data(port->serial);
 
-       urb = port->interrupt_in_urb;
-       if (!urb) {
-               dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
-               return -EINVAL;
-       }
-
        switch (mxdev->mxd_model) {
        case MXU1_1110_PRODUCT_ID:
        case MXU1_1150_PRODUCT_ID: