[Linux-stm32] [PATCH net v2 6/8] net: stmmac: RX buffer size must be 16 byte aligned

[David Miller]

From: Jose Abreu <Jose.Abreu at synopsys.com>
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.