Trying to vfree() nonexistent vm area

[selvamuthukumar v]

> ///////////////////////
> Below is outline of the driver
>
> init:
>    ppc_base = (unsigned long) ioremap_nocache(PPC_BASE, PPC_SIZE);
>
> //     ppc_base = (unsigned long) ioremap(PPC_BASE, PPC_SIZE);    // failure
> with this way too
>
>
> close:
>   iounmap((void __iomem *)ppc_base);
> //    iounmap(PPC_BASE);        // failure with this way too !
>
>
init and close seems to be wrong combinations. You can try,

open - ioremap
close - iounmap

or

init - ioremap
exit - iounmap

-- 
Selva