From bee8ce809fb1c877388be032b468574a1cfff9ef Mon Sep 17 00:00:00 2001
From: Haavard Skinnemoen <hskinnemoen@atmel.com>
Date: Tue, 24 Oct 2006 10:12:41 +0200
Subject: [PATCH] AVR32: Don't try to iounmap P2 segment addresses
While ioremap() will happily map a physical address through the
P2 (uncached) segment when appropriate, iounmap() doesn't know how
to handle those mappings.
This patch makes iounmap() do the right thing, i.e. nothing, for
such mappings.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
arch/avr32/mm/ioremap.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/avr32/mm/ioremap.c b/arch/avr32/mm/ioremap.c
index 8cfec65e37f7..3437c82434ac 100644
--- a/arch/avr32/mm/ioremap.c
+++ b/arch/avr32/mm/ioremap.c
@@ -77,6 +77,8 @@ void __iounmap(void __iomem *addr)
if ((unsigned long)addr >= P4SEG)
return;
+ if (PXSEG(addr) == P2SEG)
+ return;
p = remove_vm_area((void *)(PAGE_MASK & (unsigned long __force)addr));
if (unlikely(!p)) {
--
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