On 12/24/14 04:41, kott via freebsd-usb wrote:
the value of "r0" is 0.


In the function "_ehci_append_qh" do you know if it is the second or first call to "usb_pc_cpu_flush" which fails. The pointer which is passed as an argument to this function resides in the memory which is flushed, so most likely the cache sync operations are not working like expected!

What platform is this? Non-freebsd? Did it work before?

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