[PATCH] nvmem: core: fix return value

[Srinivas Kandagatla]

Hi Russell,

On 10/01/2023 16:48, Russell King (Oracle) wrote:
> Dan Carpenter points out that the return code was not set in commit
> 60c8b4aebd8e ("nvmem: core: fix cleanup after dev_set_name()"), but
> this is not the only issue - we also need to zero wp_gpio to prevent
> gpiod_put() being called on an error value.
> 
> Reported-by: kernel test robot <lkp at intel.com>
> Reported-by: Dan Carpenter <error27 at gmail.com>
> Fixes: 60c8b4aebd8e ("nvmem: core: fix cleanup after dev_set_name()")
> Signed-off-by: Russell King (Oracle) <rmk+kernel at armlinux.org.uk>
> ---
>   drivers/nvmem/core.c | 5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
> index 082cda7ac199..1ee2e9255f7b 100644
> --- a/drivers/nvmem/core.c
> +++ b/drivers/nvmem/core.c
> @@ -781,8 +781,11 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
>   	if (!config->ignore_wp)
>   		nvmem->wp_gpio = gpiod_get_optional(config->dev, "wp",
>   						    GPIOD_OUT_HIGH);
> -	if (IS_ERR(nvmem->wp_gpio))
> +	if (IS_ERR(nvmem->wp_gpio)) {
> +		rval = PTR_ERR(nvmem->wp_gpio);
> +		nvmem->wp_gpio = NULL;
>   		goto err_put_device;

I have already added this change while applying v3 patches.

thanks,

--srini
> +	}
>   
>   	kref_init(&nvmem->refcnt);
>   	INIT_LIST_HEAD(&nvmem->cells);