Grygorii Strashko <grygorii.strashko@xxxxxx> writes: > [ text/plain ] > On 03/30/2016 04:10 PM, Felipe Balbi wrote: >> "Thang Q. Nguyen" <tqnguyen@xxxxxxx> writes: >> >>> [ text/plain ] >>> From: "Thang Q. Nguyen" <tqnguyen@xxxxxxx> >>> >>> The xhci-hcd child node needs to inherit archdata attribute to use >>> dma_ops functions and attributes. This patch enables the USB DWC3 >>> driver to pass archdata attributes to its xhci-hcd child node. >>> >>> Changes from v2: >>> - None >>> >>> Changes from v1: >>> - None >> >> changes should be between tearline and diffstat. >> > > uh. This become a real problem :(, especially with LPAE enabled. > DMA properties need to be inherited not only here, but also in > usb_add_gadget_udc_release(). And probably in other places > where devices are created manually - the worst case : device is created > manually but doesn't belong to any bus. > > And DMA configuration must include dma_pfn_offset also! > And how about iommu staff? > > FYI. Solution used for PCI > c49b8fc of/pci: Add of_pci_dma_configure() to update DMA configuration > > Rejected: introduce dma_init_dev_from_parent() or smth. like this > http://permalink.gmane.org/gmane.linux.ports.arm.kernel/378317 I like this very much. Meanwhile, we need something (although, $subject is not very good). -- balbi
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