linux-kernel - [PATCH] mtd: maps: add missing iounmap() in error path

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Message-Id: <20161116225016.29958-1-henrix@camandro.org>
Date:   Wed, 16 Nov 2016 22:50:16 +0000
From:   Luis Henriques <henrix@...andro.org>
To:     David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>,
        Cyrille Pitchen <cyrille.pitchen@...el.com>
Cc:     linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Luis Henriques <henrix@...andro.org>
Subject: [PATCH] mtd: maps: add missing iounmap() in error path

This patch was triggered by the following Coccinelle error:

./drivers/mtd/maps/sc520cdp.c:246:3-9: \
	ERROR: missing iounmap; ioremap on line 242 \
	and execution via conditional on line 244

Signed-off-by: Luis Henriques <henrix@...andro.org>
---
 drivers/mtd/maps/sc520cdp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/mtd/maps/sc520cdp.c b/drivers/mtd/maps/sc520cdp.c
index 093edd51bdc7..7a27ed345d0d 100644
--- a/drivers/mtd/maps/sc520cdp.c
+++ b/drivers/mtd/maps/sc520cdp.c
@@ -243,6 +243,10 @@ static int __init init_sc520cdp(void)
 
 		if (!sc520cdp_map[i].virt) {
 			printk("Failed to ioremap_nocache\n");
+			if (i) {
+				while (--i)
+					iounmap(sc520cdp_map[i].virt);
+			}
 			return -EIO;
 		}