[PATCH v1 3/5] nvmem: core: Check input parameter for NULL in nvmem_unregister()

[Andy Shevchenko]

nvmem_unregister() frees resources and standard pattern is to allow
caller to not care if it's NULL or not. This will reduce burden on
the callers to perform this check.

Signed-off-by: Andy Shevchenko <andriy.shevchenko at linux.intel.com>
---
 drivers/nvmem/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 6946d14876dc..3ca6615d9430 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -903,7 +903,8 @@ static void nvmem_device_release(struct kref *kref)
  */
 void nvmem_unregister(struct nvmem_device *nvmem)
 {
-	kref_put(&nvmem->refcnt, nvmem_device_release);
+	if (nvmem)
+		kref_put(&nvmem->refcnt, nvmem_device_release);
 }
 EXPORT_SYMBOL_GPL(nvmem_unregister);
 
-- 
2.34.1