Re: Trying to vfree() nonexistent vm area

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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