From: Christoph Hellwig <hch@lst.de>
Date: Thu, 21 Oct 2021 11:01:46 +0000 (+0200)
Subject: sparc32: remove the call to dma_make_coherent in arch_dma_free
X-Git-Tag: v5.16-rc1~78^2~3
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=2c38d6a4e959a88213e24214188e056e5b8cf4c6;p=thirdparty%2Flinux.git

sparc32: remove the call to dma_make_coherent in arch_dma_free

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>
---

diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c
index 7ceae24b0ca99..59375a01c1523 100644
--- a/arch/sparc/kernel/ioport.c
+++ b/arch/sparc/kernel/ioport.c
@@ -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));
 }