Hello All, Recently I’ve been troubleshooting a problem with the host controller dying and noticed that when the controller dies, the system was unresponsive for a _long_ period of time. When I explored the code a bit, I saw that xhci_handshake will spin with interrupts disabled for up to 5 seconds. I also saw places where it would spin for up to 10 seconds (I have not experienced this though…). 5 seconds with interrupts disabled seems like an eternity.
Is there a reason that it’s done this way? It looks like the code was inherited from ehci, so the code has been used for a long period of time. Would it be possible to wait for the command ring stopped event for 5 seconds, then check the CRR bit and halt and die if it’s not cleared? Thanks! Seth
