Re: [PATCH][next] net: dsa: mv88e6xxx: avoid unintended sign extension on a 16 bit shift

[Andrew Lunn]

> diff --git a/drivers/net/dsa/mv88e6xxx/hwtstamp.c b/drivers/net/dsa/mv88e6xxx/hwtstamp.c
> index b251d534b70d..758e35fa69ab 100644
> --- a/drivers/net/dsa/mv88e6xxx/hwtstamp.c
> +++ b/drivers/net/dsa/mv88e6xxx/hwtstamp.c
> @@ -321,7 +321,7 @@ static void mv88e6xxx_get_rxts(struct mv88e6xxx_chip *chip,
>  	 */
>  	for ( ; skb; skb = skb_dequeue(rxq)) {
>  		if (mv88e6xxx_ts_valid(status) && seq_match(skb, seq_id)) {
> -			u64 ns = timehi << 16 | timelo;
> +			u64 ns = (u64)timehi << 16 | timelo;

Hi Richard

Do you prefer this, or making timehi and timelo a u64?

   Andrew