Re: when to return -EOPNOTSUPP in _ioctl in a driver

On Thu, Oct 4, 2012 at 12:29 AM, devendra.aaru <devendra.aaru@gmail.com> wrote:

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?

You're right, you should not have to. This is a staging driver though so the quality is not as good as a sane driver should look like, hence staging. Send a patch :)

as i understood from your reply that the dev_ioctl returns -EOPNOTSUPP when theres' no ioctl pointer registered in netdev_ops

am i right?

Yup. Luis