Subject: [PATCH] usb: dwc3: host: inherit dma configuration from parent dev

From: [email-masked] (Felipe Balbi)
Date: Tue, 26 Apr 2016 09:17:22 +0300

Hi,

Grygorii Strashko <[email-masked]> writes:
> Now not all DMA paremters configured properly for "xhci-hcd" platform
> device which is created manually. For example: dma_pfn_offset, dam_ops
> and iommu configuration will not corresponds "dwc3" devices
> configuration. As result, this will cause problems like wrong DMA
> addresses translation on platforms with LPAE enabled like Keystone 2.
>
> When platform is using DT boot mode the DMA configuration will be
> parsed and applied from DT, so, to fix this issue, reuse
> of_dma_configure() API and retrieve DMA configuartion for "xhci-hcd"
> from DWC3 device node.

patch is incomplete. You left out non-DT users which might suffer from
the same problem.

-- 
balbi
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