From: Stuart Bennett <stuart@freedesktop.org>
Date: Tue, 28 Apr 2009 19:17:48 +0000 (+0100)
Subject: tracing: x86, mmiotrace: fix range test
X-Git-Tag: firefly_0821_release~14243^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=33015c85995716d03f6293346cf05a1908b0fb9a;p=firefly-linux-kernel-4.4.55.git

tracing: x86, mmiotrace: fix range test

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

[ Impact: fix mmiotrace confusion on adjacent iomaps ]

Signed-off-by: Stuart Bennett <stuart@freedesktop.org>
Acked-by: Pekka Paalanen <pq@iki.fi>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1240946271-7083-2-git-send-email-stuart@freedesktop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/arch/x86/mm/kmmio.c b/arch/x86/mm/kmmio.c
index 4f115e00486b..50dc802a1c46 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;