Re: [PATCH net v2 6/8] net: stmmac: RX buffer size must be 16 byte aligned
From: David Miller
Date: Wed Dec 18 2019 - 01:56:23 EST
From: Jose Abreu <Jose.Abreu@xxxxxxxxxxxx>
Date: Tue, 17 Dec 2019 12:42:36 +0100
> We need to align the RX buffer size to at least 16 byte so that IP
> doesn't mis-behave. This is required by HW.
...
>
> -#define STMMAC_ALIGN(x) __ALIGN_KERNEL(x, SMP_CACHE_BYTES)
> +#define STMMAC_ALIGN(x) ALIGN_DOWN(ALIGN_DOWN(x, SMP_CACHE_BYTES), 16)
You need to align up, not down.