[U-Boot] [PATCH] net: fec: Avoid MX28 bus sync issue

Wolfgang Denk wd at denx.de
Fri Sep 13 18:06:44 CEST 2013


Dear Robert Hodaszi,

In message <5232F2E7.4050407 at digi.com> you wrote:
> 
> Ok. Then what about if I would use the stack, but align the buffer manually.

Has this been tested?  Does it work?

> -       uchar buff[FEC_MAX_PKT_SIZE] __aligned(ARCH_DMA_MINALIGN);
> +       /* Align the receive buffer */
> +       uchar buff_unaligned[FEC_MAX_PKT_SIZE + (ARCH_DMA_MINALIGN - 1)];
> +       uchar *buff = ((uint32_t)buff_unaligned + (ARCH_DMA_MINALIGN - 1)) & ~(ARCH_DMA_MINALIGN - 1);

You should use the ALIGN() macro here.

Best regards,

Wolfgang Denk

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