linux-kernel - [PATCH 1/3] arch/metag/kernel/cachepart.c: fix failure check

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Date:	Thu, 17 Jul 2014 16:26:26 +0300
From:	Andrey Utkin <andrey.krieger.utkin@...il.com>
To:	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
	linux-metag@...r.kernel.org
Cc:	james.hogan@...tec.com,
	Andrey Utkin <andrey.krieger.utkin@...il.com>
Subject: [PATCH 1/3] arch/metag/kernel/cachepart.c: fix failure check

[linux-3.16-rc5/arch/metag/kernel/cachepart.c:102]: (style) Checking if unsigned variable 'thread_cache_size' is less than zero.

Source code is

        if (thread_cache_size < 0)
            pr_emerg("Can't read %s cache size\n",
                 cache_type ? "DCACHE" : "ICACHE");

but

    unsigned int thread_cache_size;

Function get_thread_cache_size returns an error code
as (unsigned int) -1.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=80361
Reported-by: David Binderman <dcb314@...mail.com>
Signed-off-by: Andrey Utkin <andrey.krieger.utkin@...il.com>
---
 arch/metag/kernel/cachepart.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/metag/kernel/cachepart.c b/arch/metag/kernel/cachepart.c
index 0a2385f..b137034 100644
--- a/arch/metag/kernel/cachepart.c
+++ b/arch/metag/kernel/cachepart.c
@@ -99,7 +99,7 @@ void check_for_cache_aliasing(int thread_id)
 	for (cache_type = ICACHE; cache_type <= DCACHE; cache_type++) {
 		thread_cache_size =
 				get_thread_cache_size(cache_type, thread_id);
-		if (thread_cache_size < 0)
+		if (thread_cache_size == (unsigned int)-1)
 			pr_emerg("Can't read %s cache size\n",
 				 cache_type ? "DCACHE" : "ICACHE");
 		else if (thread_cache_size == 0)
-- 
1.8.5.5

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