[PATCH 4.4 52/73] power: reset: hisi-reboot: Unmap region obtained by of_iomap

[Greg Kroah-Hartman]

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Arvind Yadav <arvind.yadav.cs@xxxxxxxxx>

commit bae170efd6c42bf116f513a1dd07639d68fa71b9 upstream.

Free memory mapping, if probe is not successful.

Fixes: 4a9b37371822 ("power: reset: move hisilicon reboot code")
Signed-off-by: Arvind Yadav <arvind.yadav.cs@xxxxxxxxx>
Signed-off-by: Sebastian Reichel <sre@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/power/reset/hisi-reboot.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/power/reset/hisi-reboot.c
+++ b/drivers/power/reset/hisi-reboot.c
@@ -53,13 +53,16 @@ static int hisi_reboot_probe(struct plat
 
 	if (of_property_read_u32(np, "reboot-offset", &reboot_offset) < 0) {
 		pr_err("failed to find reboot-offset property\n");
+		iounmap(base);
 		return -EINVAL;
 	}
 
 	err = register_restart_handler(&hisi_restart_nb);
-	if (err)
+	if (err) {
 		dev_err(&pdev->dev, "cannot register restart handler (err=%d)\n",
 			err);
+		iounmap(base);
+	}
 
 	return err;
 }