----
in dvb-frontend.c:
----
if(cmd == FE_GET_PROPERTY) {
tvps = (struct dtv_properties __user *)parg;
dprintk("%s() properties.num = %d\n", __func__, tvps->num);
dprintk("%s() properties.props = %p\n", __func__, tvps->props);
...
if (copy_from_user(tvp, tvps->props, tvps->num *
sizeof(struct dtv_property)))
----
> OK,
>
> thought I'll have never to care for it again.
>
> ENUM calls should never be W.
>
> Hit me for all I missed.
>
> Cheers,
> Hermann
you are not seeing the point of it it seems
Documentation/ioctl-number.txt
----
If you are adding new ioctl's to the kernel, you should use the _IO
macros defined in <linux/ioctl.h>:
_IO an ioctl with no parameters
_IOW an ioctl with write parameters (copy_from_user)
_IOR an ioctl with read parameters (copy_to_user)
_IOWR an ioctl with both write and read parameters.
----
copy from user is required in order to copy the keys for the requested
elements into the kernel.
copy to user is finally used to play them back.
Markus
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