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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>
This commit is contained in:
Hans de Goede 2010-02-19 04:41:40 -03:00 committed by Mauro Carvalho Chehab
parent ac82f59f9c
commit 10ee240200
1 changed files with 10 additions and 9 deletions
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19
drivers/media/video/gspca/gspca.c
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@ -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 @@ static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev,
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;