linux-kernel - [PATCH -next] mtd: sharpslpart: Fix unsigned comparison to zero

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Message-ID: <20191230032945.18708-1-yuehaibing@huawei.com>
Date:   Mon, 30 Dec 2019 11:29:45 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <miquel.raynal@...tlin.com>, <richard@....at>, <vigneshr@...com>,
        <andrea.adami@...il.com>, <bbrezillon@...nel.org>,
        <yuehaibing@...wei.com>
CC:     <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH -next] mtd: sharpslpart: Fix unsigned comparison to zero

The unsigned variable log_num is being assigned a return value
from the call to sharpsl_nand_get_logical_num that can return
-EINVAL.

Detected using Coccinelle:
./drivers/mtd/parsers/sharpslpart.c:207:6-13: WARNING: Unsigned expression compared with zero: log_num > 0

Fixes: 8a4580e4d298 ("mtd: sharpslpart: Add sharpslpart partition parser")
Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 drivers/mtd/parsers/sharpslpart.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/parsers/sharpslpart.c b/drivers/mtd/parsers/sharpslpart.c
index e5ea612..671a618 100644
--- a/drivers/mtd/parsers/sharpslpart.c
+++ b/drivers/mtd/parsers/sharpslpart.c
@@ -165,10 +165,10 @@ static int sharpsl_nand_get_logical_num(u8 *oob)
 
 static int sharpsl_nand_init_ftl(struct mtd_info *mtd, struct sharpsl_ftl *ftl)
 {
-	unsigned int block_num, log_num, phymax;
+	unsigned int block_num, phymax;
+	int i, ret, log_num;
 	loff_t block_adr;
 	u8 *oob;
-	int i, ret;
 
 	oob = kzalloc(mtd->oobsize, GFP_KERNEL);
 	if (!oob)
-- 
2.7.4