-EFAULT error code at firedtv driver

[Mauro Carvalho Chehab <mchehab@redhat.com>]

Hi Stefan,

I'm validating if all drivers are behaving equally with respect to the
error codes returned to userspace, and double-checking with the API.

On almost all places, -EFAULT code is used only to indicate when
copy_from_user/copy_to_user fails. However, firedtv uses a lot of
-EFAULT, where it seems to me that other error codes should be used
instead (like -EIO for bus transfer errors and -EINVAL/-ERANGE for 
invalid/out of range parameters).

I'll be posting soon a series of patches fixing the error codes on the
other places, but, as I don't know how do you use -EFAULT inside the
firewire core, I prefer to not touch at firedtv.

Could you please take a look on it?

Thanks!
Mauro