From 8c751e0d9a5264376935a84429a2d468c8877d99 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Sun, 20 Feb 2022 15:15:17 +0000 Subject: [PATCH] nvmem: core: Check input parameter for NULL in nvmem_unregister() 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 Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20220220151527.17216-4-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman --- drivers/nvmem/core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -901,7 +901,8 @@ static void nvmem_device_release(struct */ 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);