> > What /dev/snapshot is simply cat-ed -- without ioctls used in normal
> > operation -- it oopses. This one should fix it.
> >
> > Signed-off-by: Pavel Machek <pavel@suse.cz>
> >
> > --- clean-mm/kernel/power/user.c 2007-06-09 16:18:12.000000000 +0200
> > +++ linux-mm/kernel/power/user.c 2007-06-11 14:06:19.000000000 +0200
> > @@ -99,6 +99,8 @@
> > ssize_t res;
> >
> > data = filp->private_data;
> > + if (!data->ready)
> > + return -EINVAL;
>
> I'd like to use -ENODATA here.
>
> > res = snapshot_read_next(&data->handle, count);
> > if (res > 0) {
> > if (copy_to_user(buf, data_of(data->handle), res))
> >
>
> I have a patch for that and I'm going to post it in a while if you don't
> mind.
>
> I've already posted it once, here:
http://lkml.org/lkml/2007/6/10/146
