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Change ISA_IO_BASE to fix_to_virt(FIX_ISAMAP_BEGIN). It used to be
PAGE_OFFSET, which was unaltered from vanilla Linux 2.6.12.6 kernels and caused isa_memcpy_fromio() to not read physical memory from 0xf0000 - 0xfffff correctly. http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=393 Signed-off-by: Andrew D. Ball <aball@us.ibm.com>
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@@ -228,7 +228,7 @@ static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int
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* used as the IO-area pointer (it can be iounmapped as well, so the
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* analogy with PCI is quite large):
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*/
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#define __ISA_IO_base ((char __iomem *)(PAGE_OFFSET))
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#define __ISA_IO_base ((char __iomem *)(fix_to_virt(FIX_ISAMAP_BEGIN)))
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#define isa_readb(a) readb(__ISA_IO_base + (a))
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#define isa_readw(a) readw(__ISA_IO_base + (a))
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@@ -298,7 +298,7 @@ void memset_io(volatile void __iomem *a, int b, size_t c);
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* used as the IO-area pointer (it can be iounmapped as well, so the
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* analogy with PCI is quite large):
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*/
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#define __ISA_IO_base ((char __iomem *)(PAGE_OFFSET))
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#define __ISA_IO_base ((char __iomem *)(fix_to_virt(FIX_ISAMAP_BEGIN)))
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#define isa_readb(a) readb(__ISA_IO_base + (a))
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#define isa_readw(a) readw(__ISA_IO_base + (a))
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