Messages in this thread | | | Date | Thu, 16 May 2019 15:47:25 +0200 | From | Fredrik Noring <> | Subject | Re: [RFC PATCH v2 0/3] prerequisites for device reserved local mem rework |
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Hi Laurentiu,
> > The kernel oopses with "unable to handle kernel paging request at virtual > > address 000aba0b" in hcd_alloc_coherent via usb_hcd_map_urb_for_dma. > > By any chance, does this address looks like the dma_addr that the device > should target?
Yes, that looks like a typical device address suitable for its DMA.
> Actually, I think I'm misusing genalloc and also it appears that i need > to add a mapping on the phys address. So my plan is to change the > "unsigned long virt" to be the void * returned by the mapping operation > and the phys_addr_t be the dma_addr_t. I'll return with a patch.
Great, I'm happy to test your next patch revision.
Fredrik
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