On Tue, Oct 2, 2012 at 8:26 AM, devendra.aaru <[email protected]> wrote: > Hi all, > > While going through some code, i have found a place in which we do return, > -EOPNOTSUPP in an ioctl and the code of ioctl does just this one. > > > static int drv_ioctl(.. *fops, ...) > { > return -EOPNOTSUPP; > } > > > 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 _______________________________________________ Kernelnewbies mailing list [email protected] http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
