[PATCH v4] clocksource/timer-imx-gpt: Prevent resource leake in error path.

From: Arvind Yadav
Date: Wed Sep 28 2016 - 13:48:41 EST


-Free previously allocated memory.
-Unmap I/O memory from kernel address space.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@xxxxxxxxx>
---
drivers/clocksource/timer-imx-gpt.c | 20 +++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/clocksource/timer-imx-gpt.c b/drivers/clocksource/timer-imx-gpt.c
index f595460..022dfdf 100644
--- a/drivers/clocksource/timer-imx-gpt.c
+++ b/drivers/clocksource/timer-imx-gpt.c
@@ -489,12 +489,16 @@ 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)
- return -ENXIO;
+ if (!imxtm->base) {
+ ret = -ENXIO;
+ goto error_free;
+ }

imxtm->irq = irq_of_parse_and_map(np, 0);
- if (imxtm->irq <= 0)
- return -EINVAL;
+ if (imxtm->irq <= 0) {
+ ret = -EINVAL;
+ goto error_iounmap;
+ }

imxtm->clk_ipg = of_clk_get_by_name(np, "ipg");

@@ -507,11 +511,17 @@ static int __init mxc_timer_init_dt(struct device_node *np, enum imx_gpt_type t

ret = _mxc_timer_init(imxtm);
if (ret)
- return ret;
+ goto error_iounmap;

initialized = 1;

return 0;
+
+error_iounmap:
+ iounmap(imxtm->base);
+error_free:
+ kfree(imxtm);
+ return ret;
}

static int __init imx1_timer_init_dt(struct device_node *np)
--
2.7.4