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

13 Sep 2013

      Dear Wolfgang Denk,
...
Dear Robert Hodaszi,
In message 5232F2E7.4050407@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.
We already have this stuff in include/common.h ... ALLOC_CACHE_ALIGNED_BUFFER it 
is called IIRC
Best regards,
Marek Vasut