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authorRobin Murphy <robin.murphy@arm.com>2018-07-27 17:14:15 +0300
committerChristoph Hellwig <hch@lst.de>2018-07-27 20:01:03 +0300
commita5516219b10218a87abb3352c82248ce3088e94a (patch)
tree0fcd29611fd351bc1974cf61cd270a78b5cc0c0f /drivers/of/platform.c
parent25622e045a6aed45c9b12d1977fcb3fc3b349a73 (diff)
downloadlinux-a5516219b10218a87abb3352c82248ce3088e94a.tar.xz
of/platform: Initialise default DMA masks
When of_dma_configure() was first born in 591c1ee465ce ("of: configure the platform device dma parameters"), everything DMA-related was factored out of of_platform_device_create_pdata() as seemed appropriate at the time. However, now that of_dma_configure() has grown into the generic handler for processing DMA-related properties from DT for all kinds of devices, it is no longer an appropriate place to be doing OF-platform-specific business. Since there are still plenty of platform drivers not setting their own masks and depending on the bus default, let's reinstate that inialisation in the OF-platform code itself, and restore the long-standing status quo from 0589342c2794 ("of: set dma_mask to point to coherent_dma_mask") Signed-off-by: Robin Murphy <robin.murphy@arm.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/of/platform.c')
-rw-r--r--drivers/of/platform.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 6925d993e1f0..7ba90c290a42 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -185,6 +185,9 @@ static struct platform_device *of_platform_device_create_pdata(
if (!dev)
goto err_clear_flag;
+ dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ if (!dev->dev.dma_mask)
+ dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
dev->dev.bus = &platform_bus_type;
dev->dev.platform_data = platform_data;
of_msi_configure(&dev->dev, dev->dev.of_node);