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sparc32: remove the call to dma_make_coherent in arch_dma_free

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LEON only needs snooping when DMA accesses are not seen on the processor
bus.  Given that coherent allocations are mapped uncached this can't
happen for those allocations.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Andreas Larsson <andreas@gaisler.com>
Acked-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig 2021-10-21 13:01:46 +02:00
parent 519d81956e
commit 2c38d6a4e9
1 changed files with 0 additions and 1 deletions
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arch/sparc/kernel/ioport.c
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@ -361,7 +361,6 @@ void arch_dma_free(struct device *dev, size_t size, void *cpu_addr,
if (!sparc_dma_free_resource(cpu_addr, size))
return;
dma_make_coherent(dma_addr, size);
srmmu_unmapiorange((unsigned long)cpu_addr, size);
free_pages((unsigned long)phys_to_virt(dma_addr), get_order(size));
}