diff mbox series

[6/8] arm-nommu: call dma_mmap_from_dev_coherent directly

Message ID 20190808160005.10325-7-hch@lst.de (mailing list archive)
State New, archived
Headers show
Series [1/8] dma-mapping: provide a better default ->get_required_mask | expand

Commit Message

Christoph Hellwig Aug. 8, 2019, 4 p.m. UTC 
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(-)

Comments

Sergei Shtylyov Aug. 9, 2019, 9:35 a.m. UTC | #1 
On 08.08.2019 19:00, Christoph Hellwig wrote:

> Ther is no need to go through dma_common_mmap for the arm-nommu

    There. :-)

> 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>
[...]

MBR, Sergei
diff mbox series

Patch

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;
 }