linux-kernel - [PATCH AUTOSEL 5.4 09/19] sparc32: page align size in arch_dma

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Date:   Wed, 22 Sep 2021 23:38:43 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Andreas Larsson <andreas@...sler.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Christoph Hellwig <hch@....de>,
        Sasha Levin <sashal@...nel.org>, davem@...emloft.net,
        sparclinux@...r.kernel.org
Subject: [PATCH AUTOSEL 5.4 09/19] sparc32: page align size in arch_dma_alloc

From: Andreas Larsson <andreas@...sler.com>

[ Upstream commit 59583f747664046aaae5588d56d5954fab66cce8 ]

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>
Reviewed-by: Sam Ravnborg <sam@...nborg.org>
Signed-off-by: Christoph Hellwig <hch@....de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 f89603855f1e..b87e0002131d 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);
-- 
2.30.2