On Fri, May 23, 2014 at 11:39 PM, Holger Hans Peter Freyther <holger@xxxxxxxxxxx> wrote: > On Tue, May 20, 2014 at 03:40:16PM -0700, Dan Williams wrote: > > Dear Dan, > >> Sorry, I don't think it is fair to users to force them to re-compile >> their kernel to get their device to work. Granted, I'm new to USB >> development, but the rate of reports of endpoint devices that mess up >> and require quirks in the hcd-driver or usb-core seems un-ending to > > thank you very much for this statement. xhci-hcd is unusable for > many people. On my laptop I can't scan more than one document, the > laptop sometimes immediately wakes up after suspend and after almost > two years all of these issues remain. That's sad. We (Sarah, Mathias, and I) really want to fix that. > I am running kernels with a hacked up pci-quirks.c for months and > scanning documents work, suspend/resume is working, no issues with > USB serials. My job is not related to Linux kernel development so > I would love to go back to a distribution kernel. Please make this > possible. In the end "xhci" appears to be a "supported" driver? Yes, there are presently 3 people hacking on the xhci bug report backlog at Intel where it was just a solitary hero before. To be fair I believe the rate of discovery of non-spec compliant quirkiness is to blame. In the meantime, as we ramp to get back on top of the tidal wave of weird device interactions with xhci, I believe it is fair to offer a workaround. Let me see if I can achieve this with a debugfs interface so that 'noxhci_port_switch' does not become a permanent ABI per Greg's concern. -- Dan -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
