Ravi Gupta <dceravigu...@gmail.com> wrote: > My device gets memory map successfully but when I tried to read from it > I get garbage value. Is there something that I am missing?
For starters, you really should allocate a page for your buffer rather than using kernel static data. mmap() allows access to page-aligned data through multiple-of-page-sized holes only[*]. Not only that, your kernel static map buffer may not necessarily have a struct page covering it, in which case virt_to_page() may not give you anything useful. Furthermore, I don't think *you* should be calling remap_pfn_range(). I think you should be leaving the mapping to the core VM routines. David [*] unless your kernel is CONFIG_MMU=n _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
