linux-kernel - [v2] clocksrouce/timer-imz-gpt: Prevent resource leaks in error path

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Message-Id: <1474554365-8928-1-git-send-email-arvind.yadav.cs@gmail.com>
Date:   Thu, 22 Sep 2016 19:56:05 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     daniel.lezcano@...aro.org, tglx@...utronix.de,
        vincent.guittot@...aro.org
Cc:     linux-kernel@...r.kernel.org
Subject: [v2] clocksrouce/timer-imz-gpt: Prevent resource leaks in error path

Free memory and memory mapping, if mxc_timer_init_dt is not successful.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
---
 drivers/clocksource/timer-imx-gpt.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/clocksource/timer-imx-gpt.c b/drivers/clocksource/timer-imx-gpt.c
index f595460..19f6860 100644
--- a/drivers/clocksource/timer-imx-gpt.c
+++ b/drivers/clocksource/timer-imx-gpt.c
@@ -489,12 +489,17 @@ static int __init mxc_timer_init_dt(struct device_node *np,  enum imx_gpt_type t
 		return -ENOMEM;
 
 	imxtm->base = of_iomap(np, 0);
-	if (!imxtm->base)
+	if (!imxtm->base) {
+		kfree(imxtm);
 		return -ENXIO;
+	}
 
 	imxtm->irq = irq_of_parse_and_map(np, 0);
-	if (imxtm->irq <= 0)
+	if (imxtm->irq <= 0) {
+		iounmap(imxtm->base);
+		kfree(imxtm);
 		return -EINVAL;
+	}
 
 	imxtm->clk_ipg = of_clk_get_by_name(np, "ipg");
 
@@ -506,8 +511,11 @@ static int __init mxc_timer_init_dt(struct device_node *np,  enum imx_gpt_type t
 	imxtm->type = type;
 
 	ret = _mxc_timer_init(imxtm);
-	if (ret)
+	if (ret) {
+		iounmap(imxtm->base);
+		kfree(imxtm);
 		return ret;
+	}
 
 	initialized = 1;
 
-- 
2.7.4