[PATCH linux dev-4.7] drivers: fsi: scom: Zero out user buffer first

[Christopher Bostic]

On 2/21/17 11:02 AM, Eddie James wrote:

> From: "Edward A. James" <eajames at us.ibm.com>
>
> Scom data is just bit-wise OR'd with the user buffer, so it needs to be
> set to 0 first.
>
> Signed-off-by: Edward A. James <eajames at us.ibm.com>
> ---
>   drivers/fsi/fsi-scom.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/drivers/fsi/fsi-scom.c b/drivers/fsi/fsi-scom.c
> index 51b3dc3..ed3b98e 100644
> --- a/drivers/fsi/fsi-scom.c
> +++ b/drivers/fsi/fsi-scom.c
> @@ -85,6 +85,7 @@ static int get_scom(struct scom_device *scom_dev, uint64_t *value,
>   	uint32_t result, data;
>   	int rc;
>
> +	*value = 0ULL;
>   	data = addr;
>   	rc = fsi_device_write(scom_dev->fsi_dev, SCOM_CMD_REG, &data,
>   				sizeof(uint32_t));
Reviewed-by: Christopher Bostic <cbostic at linux.vnet.ibm.com>