[PATCH v2] ethernet:arc: Fix racing of TX ring buffer
LinoSanfilippo at gmx.de
Sat May 21 16:04:42 PDT 2016
On 21.05.2016 21:47, Francois Romieu wrote:
> Shuyu Wei <wsy2220 at gmail.com> :
>> diff --git a/drivers/net/ethernet/arc/emac_main.c b/drivers/net/ethernet/arc/emac_main.c
>> index a3a9392..c2447b0 100644
>> --- a/drivers/net/ethernet/arc/emac_main.c
>> +++ b/drivers/net/ethernet/arc/emac_main.c
>> @@ -686,6 +686,9 @@ static int arc_emac_tx(struct sk_buff *skb, struct net_device *ndev)
>> + /* Make sure timestamp is set */
>> + smp_wmb();
> Should be dma_wmb() (see davem's message).
> It's completely unrelated to SMP.
Its also completely unrelated to dma so I doubt that this is what davem meant.
As far as I understood he was referring to the dma descriptor.
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