From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rob Herring Subject: [PATCH] of: set dma_mask to point to coherent_dma_mask Date: Wed, 30 Oct 2013 00:05:22 -0500 Message-ID: <1383109522-6879-1-git-send-email-robherring2@gmail.com> Return-path: Sender: linux-kernel-owner@vger.kernel.org To: Russell King , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Cc: stefano.stabellini@eu.citrix.com, Grant Likely , Rob Herring List-Id: devicetree@vger.kernel.org From: Rob Herring Platform devices created by DT code don't initialize dma_mask pointer to anything. Set it to coherent_dma_mask by default if the architecture code has not set it. Signed-off-by: Rob Herring --- I think this is at least part of what is needed to fix dma_mask issue raised by Stefano [1]. Things should work AFAICT with just this, but I suppose the xgmac driver needs to set the mask as well (not relying on the default), but some pointing the dma_mask to a valid value is needed first. Rob [1] http://www.mail-archive.com/linux-kernel@vger.kernel.org/msg528236.html drivers/of/platform.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/of/platform.c b/drivers/of/platform.c index f6dcde2..fce088e 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -215,6 +215,8 @@ static struct platform_device *of_platform_device_create_pdata( dev->archdata.dma_mask = 0xffffffffUL; #endif 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; -- 1.8.1.2