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
