On Wed, 23 Aug 2017, David Mosberger wrote: > Actually, I just found this commit: > > 94dfd7edf USB: HCD: support giveback of URB in tasklet context > > It won't fix the problem entirely, but I think it should cut the worst-case > irqs-disabled latency about in half, which would be a good improvement. > > Does anybody know why HCD_BH is not enabled in ohci-hcd.c?
Because it changes the semantics of isochronous and interrupt streaming. See for example commits 9118f9eb4f1e, 24f531371de1, and 46c73d1d3ebc. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
