[PATCH] powerpc/powernv/nvram: opal_nvram_write handle unknown OPAL errors

[Vasant Hegde]

On 03/26/2018 08:32 PM, Nicholas Piggin wrote:
> opal_nvram_write currently just assumes success if it encounters an
> error other than OPAL_BUSY or OPAL_BUSY_EVENT. Have it return -EIO
> on other errors instead.
> 
> Signed-off-by: Nicholas Piggin <npiggin at gmail.com>
> ---
>   arch/powerpc/platforms/powernv/opal-nvram.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/arch/powerpc/platforms/powernv/opal-nvram.c b/arch/powerpc/platforms/powernv/opal-nvram.c
> index 9db4398ded5d..13bf625dc3e8 100644
> --- a/arch/powerpc/platforms/powernv/opal-nvram.c
> +++ b/arch/powerpc/platforms/powernv/opal-nvram.c
> @@ -59,6 +59,8 @@ static ssize_t opal_nvram_write(char *buf, size_t count, loff_t *index)
>   		if (rc == OPAL_BUSY_EVENT)
>   			opal_poll_events(NULL);

Current code does continuous poller here. May be we have small breathing time 
here. What you say?


>   	}
> +	if (rc)
> +		return -EIO;

Good catch. Thanks!

Reviewed-by: Vasant Hegde <hegdevasant at linux.vnet.ibm.com>

-Vasant