[PATCH] reset: sunxi: fix memory region leak on ioremap failure

[Zhao Dongdong]

From: Zhao Dongdong <zhaodongdong@xxxxxxxxxx>

In sunxi_reset_init(), when ioremap() fails, the memory region obtained
via request_mem_region() is not released, leading to a resource leak.

Add an err_mem_region label to properly release the memory region before
freeing the data structure.

Fixes: 8f1ae77f4666 ("reset: Add Allwinner SoCs Reset Controller Driver")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Zhao Dongdong <zhaodongdong@xxxxxxxxxx>
---
 drivers/reset/reset-sunxi.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/reset/reset-sunxi.c b/drivers/reset/reset-sunxi.c
index 2544de6576e4..2f6df7707cad 100644
--- a/drivers/reset/reset-sunxi.c
+++ b/drivers/reset/reset-sunxi.c
@@ -44,7 +44,7 @@ static int sunxi_reset_init(struct device_node *np)
 	data->membase = ioremap(res.start, size);
 	if (!data->membase) {
 		ret = -ENOMEM;
-		goto err_alloc;
+		goto err_mem_region;
 	}
 
 	spin_lock_init(&data->lock);
@@ -57,6 +57,8 @@ static int sunxi_reset_init(struct device_node *np)
 
 	return reset_controller_register(&data->rcdev);
 
+err_mem_region:
+	release_mem_region(res.start, size);
 err_alloc:
 	kfree(data);
 	return ret;
-- 
2.25.1