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

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Date:	Thu, 17 Jul 2014 18:58:06 +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, dan.carpenter@...cle.com,
	Andrey Utkin <andrey.krieger.utkin@...il.com>
Subject: [PATCH] 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.

Changed get_thread_cache_size() to return signed int, and its result is stored
into signed int variable.

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 | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/metag/kernel/cachepart.c b/arch/metag/kernel/cachepart.c
index 0a2385f..04b7d4f 100644
--- a/arch/metag/kernel/cachepart.c
+++ b/arch/metag/kernel/cachepart.c
@@ -55,7 +55,7 @@ unsigned int get_global_icache_size(void)
 	return (get_icache_size() * ((temp >> SYSC_xCPARTG_AND_S) + 1)) >> 4;
 }
 
-static unsigned int get_thread_cache_size(unsigned int cache, int thread_id)
+static int get_thread_cache_size(unsigned int cache, int thread_id)
 {
 	unsigned int cache_size;
 	unsigned int t_cache_part;
@@ -94,7 +94,7 @@ static unsigned int get_thread_cache_size(unsigned int cache, int thread_id)
 
 void check_for_cache_aliasing(int thread_id)
 {
-	unsigned int thread_cache_size;
+	int thread_cache_size;
 	unsigned int cache_type;
 	for (cache_type = ICACHE; cache_type <= DCACHE; cache_type++) {
 		thread_cache_size =
-- 
1.8.5.5

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