V4L/DVB: gspca_main: some input error handling fixes

2 small changes to input device error handling:
1) Make it fatal when we fail to create an input device (it is either this
   or add checks for gspca_dev->input_dev being NULL in a lot of places)
2) Since we allow gspca_input_create_urb() to fail everywhere we call it,
   and thus never check its return value, make it void.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 10 insertions, 9 deletions

diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c
index d9a934b99a89..a156dd42bc40 100644
--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -184,8 +184,7 @@ static int gspca_input_connect(struct gspca_dev *dev)
                 } else {
                         dev->input_dev = input_dev;
                 }
-        } else
-                err = -EINVAL;
+        }
 
         return err;
 }
@@ -243,9 +242,8 @@ error:
         return ret;
 }
 
-static int gspca_input_create_urb(struct gspca_dev *gspca_dev)
+static void gspca_input_create_urb(struct gspca_dev *gspca_dev)
 {
-        int ret = -EINVAL;
         struct usb_interface *intf;
         struct usb_host_interface *intf_desc;
         struct usb_endpoint_descriptor *ep;
@@ -259,12 +257,11 @@ static int gspca_input_create_urb(struct gspca_dev *gspca_dev)
                         if (usb_endpoint_dir_in(ep) &&
                             usb_endpoint_xfer_int(ep)) {
 
-                                ret = alloc_and_submit_int_urb(gspca_dev, ep);
+                                alloc_and_submit_int_urb(gspca_dev, ep);
                                 break;
                         }
                 }
         }
-        return ret;
 }
 
 static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
@@ -2289,6 +2286,10 @@ int gspca_dev_probe(struct usb_interface *intf,
                 goto out;
         gspca_set_default_mode(gspca_dev);
 
+        ret = gspca_input_connect(gspca_dev);
+        if (ret)
+                goto out;
+
         mutex_init(&gspca_dev->usb_lock);
         mutex_init(&gspca_dev->read_lock);
         mutex_init(&gspca_dev->queue_lock);
@@ -2310,12 +2311,12 @@ int gspca_dev_probe(struct usb_interface *intf,
         usb_set_intfdata(intf, gspca_dev);
         PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev));
 
-        ret = gspca_input_connect(gspca_dev);
-        if (ret == 0)
-                ret = gspca_input_create_urb(gspca_dev);
+        gspca_input_create_urb(gspca_dev);
 
         return 0;
 out:
+        if (gspca_dev->input_dev)
+                input_unregister_device(gspca_dev->input_dev);
         kfree(gspca_dev->usb_buf);
         kfree(gspca_dev);
         return ret;