sh: Handle ioport_map() cases for >= P1SEG addresses.

This fixes up the case where certain drivers already do their own
remapping and subsequently attempt to use the PIO calls for I/O. In this
case there is no additional remapping that needs to be done, and the
address can be casted in to the cookie directly.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/sh/kernel/io_generic.c b/arch/sh/kernel/io_generic.c
index 4ff50723928..b8fa6524760 100644
--- a/arch/sh/kernel/io_generic.c
+++ b/arch/sh/kernel/io_generic.c
@@ -147,6 +147,9 @@ void generic_outsl(unsigned long port, const void *src, unsigned long count)
 
 void __iomem *generic_ioport_map(unsigned long addr, unsigned int size)
 {
+	if (PXSEG(addr) >= P1SEG)
+		return (void __iomem *)addr;
+
 	return (void __iomem *)(addr + generic_io_base);
 }