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-rw-r--r--drivers/usb/serial/digi_acceleport.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c
index 010a42a92688..16e8e37b3b36 100644
--- a/drivers/usb/serial/digi_acceleport.c
+++ b/drivers/usb/serial/digi_acceleport.c
@@ -1251,8 +1251,27 @@ static int digi_port_init(struct usb_serial_port *port, unsigned port_num)
static int digi_startup(struct usb_serial *serial)
{
+ struct device *dev = &serial->interface->dev;
struct digi_serial *serial_priv;
int ret;
+ int i;
+
+ /* check whether the device has the expected number of endpoints */
+ if (serial->num_port_pointers < serial->type->num_ports + 1) {
+ dev_err(dev, "OOB endpoints missing\n");
+ return -ENODEV;
+ }
+
+ for (i = 0; i < serial->type->num_ports + 1 ; i++) {
+ if (!serial->port[i]->read_urb) {
+ dev_err(dev, "bulk-in endpoint missing\n");
+ return -ENODEV;
+ }
+ if (!serial->port[i]->write_urb) {
+ dev_err(dev, "bulk-out endpoint missing\n");
+ return -ENODEV;
+ }
+ }
serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL);
if (!serial_priv)