[PATCH] reset: socfpga: add error handling and release mem-region

[Dinh Nguyen]

In case of an error, call release_mem_region when an error happens
during allocation of resources. Also add error handling for the case
that reset_controller_register fails.

Reported-by: kernel test robot <l...@intel.com>
Reported-by: Dan Carpenter <dan.carpen...@oracle.com>
Signed-off-by: Dinh Nguyen <dingu...@kernel.org>
---
 drivers/reset/reset-socfpga.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/reset/reset-socfpga.c b/drivers/reset/reset-socfpga.c
index bdd984296196..af9041ec37c6 100644
--- a/drivers/reset/reset-socfpga.c
+++ b/drivers/reset/reset-socfpga.c
@@ -44,7 +44,7 @@ static int a10_reset_init(struct device_node *np)
        data->membase = ioremap(res.start, size);
        if (!data->membase) {
                ret = -ENOMEM;
-               goto err_alloc;
+               goto release_region;
        }
 
        if (of_property_read_u32(np, "altr,modrst-offset", &reg_offset))
@@ -59,7 +59,14 @@ static int a10_reset_init(struct device_node *np)
        data->rcdev.of_node = np;
        data->status_active_low = true;
 
-       return reset_controller_register(&data->rcdev);
+       ret = reset_controller_register(&data->rcdev);
+       if (ret)
+               pr_err("unable to register device\n");
+
+       return 0;
+
+release_region:
+       release_mem_region(res.start, size);
 
 err_alloc:
        kfree(data);
-- 
2.17.1