On 09/29/2017 11:36 AM, Vivien Didelot wrote:
> In a single-chip switch fabric, there is no need to fetch the dsa_switch
> structure from the tree, directly use the CPU port's "ds" member.
> 
> Signed-off-by: Vivien Didelot <vivien.dide...@savoirfairelinux.com>
> ---
>  net/dsa/tag_lan9303.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/net/dsa/tag_lan9303.c b/net/dsa/tag_lan9303.c
> index 0b9826105e42..f0b51acf36ac 100644
> --- a/net/dsa/tag_lan9303.c
> +++ b/net/dsa/tag_lan9303.c
> @@ -72,11 +72,10 @@ static struct sk_buff *lan9303_rcv(struct sk_buff *skb, 
> struct net_device *dev,
>  {
>       u16 *lan9303_tag;
>       struct dsa_switch_tree *dst = dev->dsa_ptr;
> -     struct dsa_switch *ds;
> +     struct dsa_port *cpu_dp = dst->cpu_dp;
> +     struct dsa_switch *ds = cpu_dp->ds;
>       unsigned int source_port;
>  
> -     ds = dst->ds[0];
> -
>       if (unlikely(!ds)) {
>               dev_warn_ratelimited(&dev->dev, "Dropping packet, due to 
> missing DSA switch device\n");
>               return NULL;

Similarly to the patch before, you can probably drop this test, I don't
actually see how we could trigger it.
-- 
Florian

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