Hi, > As said in another mail, I found that the root cause is that xilinx_zynq has > two EHCI controller. If we use usb-storage disk, the disk will be attached to > the second EHCI controller, which the kernel uses the first EHCI controller > by default.
For the linux kernel it shouldn't matter where the usb stick is connected. Assuming it finds both ehci controllers. Does it? > For now, qemu doesn't support two EHCI controller, could we remove the second > EHCI from xilinx_zynq? Two controllers should work just fine. I'd suggest to find the root cause instead of doctoring like this. ehci + usb core are fine with two controllers & busses, maybe the arch plumbing (device tree?) misses something so the linux kernel doesn't find the second ehci controller. cheers, Gerd
