From: Jean-Christophe Dubois <jdubois@mc.com>
Date: Wed, 28 Mar 2007 10:07:41 +0000 (+0100)
Subject: [POWERPC] Fix dcr_unmap()
X-Git-Tag: v2.6.21-rc6~71
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=190a4408ecb577391ea5fbd1f90148a6992a5756;p=linux-2.6

[POWERPC] Fix dcr_unmap()

Fix a bug in dcr_unmap().

At unmap time the DCR offset need to be added instead of substracted.

Signed-off-by: Jean-Christophe Dubois <jdubois@mc.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---

diff --git a/arch/powerpc/sysdev/dcr.c b/arch/powerpc/sysdev/dcr.c
index dffeeaeca1..1fc5819e7d 100644
--- a/arch/powerpc/sysdev/dcr.c
+++ b/arch/powerpc/sysdev/dcr.c
@@ -129,7 +129,7 @@ void dcr_unmap(dcr_host_t host, unsigned int dcr_n, unsigned int dcr_c)
 
 	if (h.token == NULL)
 		return;
-	h.token -= dcr_n * h.stride;
+	h.token += dcr_n * h.stride;
 	iounmap(h.token);
 	h.token = NULL;
 }