[media] dvb_usb_v2: ensure driver_info is not null

It could be null in case of driver does not set it
properly, like missing dynamic ID handling.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 11 insertions, 2 deletions

diff --git a/drivers/media/dvb/dvb-usb/dvb_usb_init.c b/drivers/media/dvb/dvb-usb/dvb_usb_init.c
index a2beb60908d1..3078371d626b 100644
--- a/drivers/media/dvb/dvb-usb/dvb_usb_init.c
+++ b/drivers/media/dvb/dvb-usb/dvb_usb_init.c
@@ -258,10 +258,18 @@ int dvb_usbv2_device_init_(struct usb_interface *intf,
         struct dvb_usb_device *d = NULL;
         struct dvb_usb_driver_info *driver_info =
                         (struct dvb_usb_driver_info *) id->driver_info;
-        const struct dvb_usb_device_properties *props = driver_info->props;
+        const struct dvb_usb_device_properties *props;
         int ret = -ENOMEM;
         bool cold = false;
 
+        if (!id->driver_info) {
+                pr_err("%s: driver_info is null", KBUILD_MODNAME);
+                ret = -ENODEV;
+                goto err;
+        }
+
+        props = driver_info->props;
+
         d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL);
         if (d == NULL) {
                 err("no memory for 'struct dvb_usb_device'");
@@ -326,7 +334,8 @@ int dvb_usbv2_device_init_(struct usb_interface *intf,
 err_kfree:
         kfree(d->priv);
         kfree(d);
-
+err:
+        pr_debug("%s: failed=%d\n", __func__, ret);
         return ret;
 }