On Thursday, August 13, 2015 at 10:56:27 PM, Sergei Temerkhanov wrote:
Hi!
(please stop top-posting ; please keep the list in the loop)
Well, when I was working on this, setting large transfer sizes resulted in, AFAIR, xhci_wait_for_event() timeout and changing XHCI_TIMEOUT doesn't help. This function returns NULL which is being dereferenced somewhere else (I don't remember where exactly), there are several places in the generic xhci support code where this is possible.
I suspect we might need a quirk for the XHCI instead them (quirk that the controller gets stuck when you try to queue arbitrary number of descriptors). But I wonder, don't you have some cache problems instead ? Try disabling dcache (CONFIG_SYS_DCACHE_OFF) on your machine and see if that fixes the problem .
Best regards, Marek Vasut