linux-kernel - [PATCH] sparc32: Page align size in arch_dma

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Date:   Wed,  8 Sep 2021 09:48:22 +0200
From:   Andreas Larsson <andreas@...sler.com>
To:     David Miller <davem@...emloft.net>, sparclinux@...r.kernel.org
Cc:     Christoph Hellwig <hch@....de>, Sam Ravnborg <sam@...nborg.org>,
        linux-kernel@...r.kernel.org, software@...sler.com
Subject: [PATCH] sparc32: Page align size in arch_dma_alloc

Commit 53b7670e5735 ("sparc: factor the dma coherent mapping into
helper") lost the page align for the calls to dma_make_coherent and
srmmu_unmapiorange. The latter cannot handle a non page aligned len
argument.

Signed-off-by: Andreas Larsson <andreas@...sler.com>
---
 arch/sparc/kernel/ioport.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c
index 8e1d72a16759..7ceae24b0ca9 100644
--- a/arch/sparc/kernel/ioport.c
+++ b/arch/sparc/kernel/ioport.c
@@ -356,7 +356,9 @@ void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
 void arch_dma_free(struct device *dev, size_t size, void *cpu_addr,
 		dma_addr_t dma_addr, unsigned long attrs)
 {
-	if (!sparc_dma_free_resource(cpu_addr, PAGE_ALIGN(size)))
+	size = PAGE_ALIGN(size);
+
+	if (!sparc_dma_free_resource(cpu_addr, size))
 		return;
 
 	dma_make_coherent(dma_addr, size);
-- 
2.17.1