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Subjectvirt_to_page() with ioremap_nocache -> Ooops

I have implemented mmap with (nopage), the mmaping consists of normal
memory from __get_free_pages (set to RESERVED) and some registers/memory
that are on a PCI card (bar0), i mapped it with ioremap_nocache to to be
able to read and write it in kernelspace.

I tried to use virt_to_page(address_from_ioremap_nocache + some_offset)
and gave this back from the (nopage) function, but this leads to an
Oops. (with the other memory it works)

Where is here my error?

Christian Leber

"Omnis enim res, quae dando non deficit, dum habetur et non datur,
nondum habetur, quomodo habenda est." (Aurelius Augustinus)
Translation: <>
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