2020-08-03 02:02:30

by Huang Guobin

Subject: [PATCH net-next] tipc: Use is_broadcast_ether_addr() instead of memcmp()

Using is_broadcast_ether_addr() instead of directly use
memcmp() to determine if the ethernet address is broadcast
address.

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)

Signed-off-by: Huang Guobin <[email protected]>
---
net/tipc/eth_media.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c
index 8b0bb600602d..c68019697cfe 100644
--- a/net/tipc/eth_media.c
+++ b/net/tipc/eth_media.c
@@ -62,12 +62,10 @@ static int tipc_eth_raw2addr(struct tipc_bearer *b,
struct tipc_media_addr *addr,
char *msg)
{
- char bcast_mac[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
-
memset(addr, 0, sizeof(*addr));
ether_addr_copy(addr->value, msg);
addr->media_id = TIPC_MEDIA_TYPE_ETH;
- addr->broadcast = !memcmp(addr->value, bcast_mac, ETH_ALEN);
+ addr->broadcast = is_broadcast_ether_addr(addr->value);
return 0;
}

--
2.17.1

2020-08-03 14:09:02

by Ying Xue

Subject: Re: [PATCH net-next] tipc: Use is_broadcast_ether_addr() instead of memcmp()

On 8/3/20 10:00 AM, Huang Guobin wrote:
> Using is_broadcast_ether_addr() instead of directly use
> memcmp() to determine if the ethernet address is broadcast
> address.
>
> spatch with a semantic match is used to found this problem.
> (http://coccinelle.lip6.fr/)
>
> Signed-off-by: Huang Guobin <[email protected]>

Acked-by: Ying Xue <[email protected]>

> ---
> net/tipc/eth_media.c | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c
> index 8b0bb600602d..c68019697cfe 100644
> --- a/net/tipc/eth_media.c
> +++ b/net/tipc/eth_media.c
> @@ -62,12 +62,10 @@ static int tipc_eth_raw2addr(struct tipc_bearer *b,
> struct tipc_media_addr *addr,
> char *msg)
> {
> - char bcast_mac[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
> -
> memset(addr, 0, sizeof(*addr));
> ether_addr_copy(addr->value, msg);
> addr->media_id = TIPC_MEDIA_TYPE_ETH;
> - addr->broadcast = !memcmp(addr->value, bcast_mac, ETH_ALEN);
> + addr->broadcast = is_broadcast_ether_addr(addr->value);
> return 0;
> }
>
>

2020-08-03 23:24:41

by David Miller

Subject: Re: [PATCH net-next] tipc: Use is_broadcast_ether_addr() instead of memcmp()

From: Huang Guobin <[email protected]>
Date: Sun, 2 Aug 2020 22:00:55 -0400

> Using is_broadcast_ether_addr() instead of directly use
> memcmp() to determine if the ethernet address is broadcast
> address.
>
> spatch with a semantic match is used to found this problem.
> (http://coccinelle.lip6.fr/)
>
> Signed-off-by: Huang Guobin <[email protected]>

Applied, thank you.