Messages in this thread | | | Subject | Re: [PATCH V2 1/3] scsi: mptxsas: try 64 bit DMA when 32 bit DMA fails | From | Timur Tabi <> | Date | Tue, 10 Nov 2015 15:59:18 -0600 |
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On 11/10/2015 03:54 PM, Arnd Bergmann wrote:
>> In our drivers for 32-bit devices, we have to explicitly set the DMA >> mask to 32-bits in order to get any DMA working. > > Do you mean PCI devices or platform devices?
Platform.
> Maybe the parent bus is lacking a dma-ranges property?
All of this applies only on device-tree platforms. Sinan and I are working on an ACPI server platform. So we never call of_dma_configure(), and we don't have a dma-ranges property.
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