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From: Christoph Hellwig <hch@lst.de>
To: iommu@lists.linux-foundation.org,
	Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Vladimir Murzin <vladimir.murzin@arm.com>,
	Takashi Iwai <tiwai@suse.de>, Helge Deller <deller@gmx.de>,
	Robin Murphy <robin.murphy@arm.com>,
	Michal Simek <monstr@monstr.eu>,
	linux-arm-kernel@lists.infradead.org,
	linux-m68k@lists.linux-m68k.org, linux-parisc@vger.kernel.org,
	linux-sh@vger.kernel.org, linux-xtensa@linux-xtensa.org,
	linuxppc-dev@lists.ozlabs.org, x86@kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 6/8] arm-nommu: call dma_mmap_from_dev_coherent directly
Date: Thu,  8 Aug 2019 19:00:03 +0300
Message-ID: <20190808160005.10325-7-hch@lst.de> (raw)
In-Reply-To: <20190808160005.10325-1-hch@lst.de>

Ther is no need to go through dma_common_mmap for the arm-nommu
dma mmap implementation as the only possible memory not handled above
could be that from the per-device coherent pool.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/arm/mm/dma-mapping-nommu.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mm/dma-mapping-nommu.c b/arch/arm/mm/dma-mapping-nommu.c
index 52b82559d99b..db9247898300 100644
--- a/arch/arm/mm/dma-mapping-nommu.c
+++ b/arch/arm/mm/dma-mapping-nommu.c
@@ -68,8 +68,9 @@ static int arm_nommu_dma_mmap(struct device *dev, struct vm_area_struct *vma,
 
 	if (dma_mmap_from_global_coherent(vma, cpu_addr, size, &ret))
 		return ret;
-
-	return dma_common_mmap(dev, vma, cpu_addr, dma_addr, size, attrs);
+	if (dma_mmap_from_dev_coherent(dev, vma, cpu_addr, size, &ret))
+		return ret;
+	return -ENXIO;
 }
 
 
-- 
2.20.1


  parent reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-08 15:59 remove default fallbacks in dma_map_ops v3 Christoph Hellwig
2019-08-08 15:59 ` [PATCH 1/8] dma-mapping: provide a better default ->get_required_mask Christoph Hellwig
2019-08-08 15:59 ` [PATCH 2/8] dma-mapping: move the dma_get_sgtable API comments from arm to common code Christoph Hellwig
2019-08-08 16:00 ` [PATCH 3/8] dma-mapping: explicitly wire up ->mmap and ->get_sgtable Christoph Hellwig
2019-08-08 16:00 ` [PATCH 4/8] dma-mapping: add a dma_can_mmap helper Christoph Hellwig
2019-08-08 16:00 ` [PATCH 5/8] ALSA: pcm: use dma_can_mmap() to check if a device supports dma_mmap_* Christoph Hellwig
2019-08-08 16:00 ` Christoph Hellwig [this message]
2019-08-09  9:35   ` [PATCH 6/8] arm-nommu: call dma_mmap_from_dev_coherent directly Sergei Shtylyov
2019-08-08 16:00 ` [PATCH 7/8] parisc: don't set ARCH_NO_COHERENT_DMA_MMAP Christoph Hellwig
2019-08-15  7:36   ` Christoph Hellwig
2019-08-15  9:25   ` James Bottomley
2019-08-15 10:50     ` Christoph Hellwig
2019-08-19 14:25       ` Christoph Hellwig
2019-08-08 16:00 ` [PATCH 8/8] dma-mapping: remove CONFIG_ARCH_NO_COHERENT_DMA_MMAP Christoph Hellwig
2019-08-09  7:21   ` Geert Uytterhoeven
2019-08-29 15:38 ` remove default fallbacks in dma_map_ops v3 Christoph Hellwig

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