linux-kernel - [PATCH] x86 mmiotrace: fix range test

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Date:	Tue, 28 Apr 2009 20:17:48 +0100
From:	Stuart Bennett <stuart@...edesktop.org>
To:	Ingo Molnar <mingo@...e.hu>, Steven Rostedt <rostedt@...dmis.org>
Cc:	Pekka Paalanen <pq@....fi>, linux-kernel@...r.kernel.org,
	Stuart Bennett <stuart@...edesktop.org>
Subject: [PATCH] x86 mmiotrace: fix range test

Matching on (addr == (p->addr + p->len)) causes problems when mappings
are adjacent

Signed-off-by: Stuart Bennett <stuart@...edesktop.org>
Acked-by: Pekka Paalanen <pq@....fi>
---
 arch/x86/mm/kmmio.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/mm/kmmio.c b/arch/x86/mm/kmmio.c
index 4f115e0..50dc802 100644
--- a/arch/x86/mm/kmmio.c
+++ b/arch/x86/mm/kmmio.c
@@ -87,7 +87,7 @@ static struct kmmio_probe *get_kmmio_probe(unsigned long addr)
 {
 	struct kmmio_probe *p;
 	list_for_each_entry_rcu(p, &kmmio_probes, list) {
-		if (addr >= p->addr && addr <= (p->addr + p->len))
+		if (addr >= p->addr && addr < (p->addr + p->len))
 			return p;
 	}
 	return NULL;
-- 
1.5.4.4

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