Messages in this thread | | | Subject | Missing USB XHCI and EHCI reset for kexec | From | Stefani Seibold <> | Date | Sun, 13 Apr 2014 21:22:39 +0200 |
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When executing a kexec kernel on a PowerPC board the new started kernel will not find already enumerated USB devices due a missing reset on the USB bus.
As a work around a
echo 1 >/sys/bus/pci/drivers/[ex]hci-pci/BUS-ADDRESS-OF-THE-HCD/reset
will solve this. But this is far from beauty.
My latest kernel without this issue was for EHCI kernel 2.6.39 and for XHCI kernel 3.4, but i have no idea when exactly this behavior was introduced.
For X86 all is fine.
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