On Tue, Oct 2, 2012 at 4:07 PM, Luis R. Rodriguez
<mcgrof@xxxxxxxxxxxxxxxx> wrote:
>> do we actually need to specify a pointer to the ioctl callback, if the
>> driver doesn't support ioctl?
>
> What type of driver? For networking if you do not have
> ops->ndo_do_ioctl then -EOPNOTSUPP is returned. See dev_ifsioc() and
> prior to that dev_ioctl() on net/core/dev.c.
>
> Luis
Hi Luis,
Thanks for the reply,
actually i see it in drivers/staging/csr/
this is in netdev.c
here they do the below way
csr_xxx_ioctl(....)
{
int ret;
ret = -EOPNOTSUPP;
return ret;
}
if the ioctl just needs to say that i am not going to support ioctl,
then why we give the function address in the netdev_ops?
as i understood from your reply that the dev_ioctl returns -EOPNOTSUPP
when theres' no ioctl pointer registered in netdev_ops
am i right?
sorry for late reply,
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