[PATCH v2 1/5] nvmem: fix nvmem_register error path

[Marco Felsch]

Currently the nvmem memory is freed without removing/unregister the
nvmem->dev if nvmem_register_cdev() fails. Fix this by unregister the
device first, free the memory and return the error code.

Signed-off-by: Marco Felsch <m.fel...@pengutronix.de>
---
v2:
- new patch

 drivers/nvmem/core.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index bf393fc180ab..fe93a2ca5f48 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -234,15 +234,19 @@ struct nvmem_device *nvmem_register(const struct 
nvmem_config *config)
 
        if (!config->cdev) {
                rval = nvmem_register_cdev(nvmem, config->name);
-               if (rval) {
-                       kfree(nvmem);
-                       return ERR_PTR(rval);
-               }
+               if (rval)
+                       goto err_unregister;
        }
 
        list_add_tail(&nvmem->node, &nvmem_devs);
 
        return nvmem;
+
+err_unregister:
+       unregister_device(&nvmem->dev);
+       kfree(nvmem);
+
+       return ERR_PTR(rval);
 }
 EXPORT_SYMBOL_GPL(nvmem_register);
 
-- 
2.39.2