From: Robert Love <rml@novell.com>
Date: Tue, 6 Sep 2005 22:18:30 +0000 (-0700)
Subject: [PATCH] fix: dmi_check_system
X-Git-Tag: v2.6.14-rc1~620
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=640e803376b9c4072f69fec42e304c974a631298;p=linux-2.6

[PATCH] fix: dmi_check_system

Background:

	1) dmi_check_system() returns the count of the number of
	   matches.  Zero thus means no matches.
	2) A match callback can return nonzero to stop the match
	   checking.

Bug: The count is incremented after we check for the nonzero return value,
so it does not reflect the actual count.  We could say this is intended,
for some dumb reason, except that it means that a match on the first check
returns zero--no matches--if the callback returns nonzero.

Attached patch implements the count before calling the callback and thus
before potentially short-circuiting.

Signed-off-by: Robert Love <rml@novell.com>
Cc: Andrey Panin <pazke@donpac.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/i386/kernel/dmi_scan.c b/arch/i386/kernel/dmi_scan.c
index c4a73855e3..58516e2ac1 100644
--- a/arch/i386/kernel/dmi_scan.c
+++ b/arch/i386/kernel/dmi_scan.c
@@ -248,9 +248,9 @@ int dmi_check_system(struct dmi_system_id *list)
 			/* No match */
 			goto fail;
 		}
+		count++;
 		if (d->callback && d->callback(d))
 			break;
-		count++;
 fail:		d++;
 	}