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| H A D | fec_main.c | diff ffd32a92b33b95771f63727560fa12c75191e705 Mon Nov 21 10:46:09 CET 2022 Christoph Hellwig <hch@lst.de> net: fec: use dma_alloc_noncoherent for data cache enabled coldfire
Coldfire platforms with data caches can't properly implement
dma_alloc_coherent and currently just return noncoherent memory from
dma_alloc_coherent.
The fec driver than works around this with a flush of all caches in the
receive path. Make this hack a little less bad by using the explicit
dma_alloc_noncoherent API and documenting the hacky cache flushes so
that the DMA API level hack can be removed.
Also replace the check for CONFIG_M532x for said hack with a check
for COLDFIRE && !COLDFIRE_COHERENT_DMA. While m532x is the only such
platform with a fec module, this makes the code more consistent and
easier to follow.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Greg Ungerer <gerg@linux-m68k.org>
Tested-by: Greg Ungerer <gerg@linux-m68k.org>
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