Am Freitag, 9. Februar 2007 23:12 schrieb Alan Stern:
> +static ssize_t
> +set_suspended(struct device *dev, struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + struct usb_device *udev = to_usb_device(dev);
> + unsigned value;
> + int rc;
> +
> + if (sscanf(buf, "%u", &value) != 1 || value > 1)
> + return -EINVAL;
> + usb_lock_device(udev);
> + if (value)
> + rc = usb_bus_type.suspend(dev, PMSG_SUSPEND);
Thirdly, doesn't this have security implications? You can shut down
network interfaces and swap spaces this way.
> + else {
> + rc = usb_autoresume_device(udev);
This seems asymmetric. Here you use an autosuspend function, while
the opposite value does a "hard" suspend.
Regards
Oliver
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