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 https://lkml.org/lkml/2014/11/4/519 -- regards, -grygorii -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
