Re: [PATCH 02/10] xhci: 'noxhci_port_switch' kernel parameter

2014-07-11 Thread Holger Hans Peter Freyther
On Sat, May 24, 2014 at 07:13:12AM -0700, Dan Williams wrote: Good Afternoon, > 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. I wonder if there is another non-ABI option? Couldn't the ports be uncond

Re: [PATCH 02/10] xhci: 'noxhci_port_switch' kernel parameter

2014-05-23 Thread Holger Hans Peter Freyther
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

Re: [PATCH] xhci: 'noxhci_port_switch' kernel parameter

2014-03-06 Thread Holger Hans Peter Freyther
On Mon, Feb 24, 2014 at 11:37:35AM -0800, Dan Williams wrote: > Add a command line switch for disabling ehci port switchover. Useful > for working around / debugging xhci incompatibilities where ehci > operation is available. Lovely and thank you for creating the patch. I will try to find time to

Re: [PATCH] RFC: Allow to blacklist xhci_hcd module and use ports with EHCI

2014-01-07 Thread Holger Hans Peter Freyther
On Tue, Jan 07, 2014 at 10:32:08AM -0500, Alan Stern wrote: > > I think in my case quirk_usb_handoff_xhci is called during boot that > > will switch the ports to the XHCI. > > That's what I said. Early PCI processing occurs during boot. Sure, I was referring to "run only when the computer is tu

Re: [PATCH] RFC: Allow to blacklist xhci_hcd module and use ports with EHCI

2014-01-07 Thread Holger Hans Peter Freyther
On Tue, Jan 07, 2014 at 12:19:58AM -0800, Dan Williams wrote: > Hi Holger, > > Is there another thread somewhere that details the issues this device > has with xhci? The initial report from 2012 is here[1]. I asked again[2] in May 2013 and now in December[3]. From time to time I have issues with

Re: [PATCH] RFC: Allow to blacklist xhci_hcd module and use ports with EHCI

2014-01-06 Thread Holger Hans Peter Freyther
On Mon, Jan 06, 2014 at 04:44:51PM -0500, Alan Stern wrote: > Finally, blacklisting xhci-hcd won't solve the problem at hand, because > the ports get switched from EHCI to xHCI during early PCI processing, > before xhci-hcd is loaded. The only check is for whether > CONFIG_USB_XHCI_HCD is enabled

[PATCH] RFC: Allow to blacklist xhci_hcd module and use ports with EHCI

2013-12-23 Thread Holger Hans Peter Freyther
From: Holger Hans Peter Freyther xhci_hcd does not work with the Canon Lide scanners and has issues with the suspend/resume handling. My Acer Aspire S5 notebook only exposes USB3.0 ports and the distribution kernels generally have xhci_hcd enabled and I don't have any USB3.0 hardware eithe

Re: xhci_hcd and Canon Lide 110 not playing well together

2013-12-21 Thread Holger Hans Peter Freyther
On Fri, Dec 20, 2013 at 03:41:36PM -0800, Sarah Sharp wrote: > The first one fixes an issue where userspace tries to reset a USB > endpoint when it's not actually halted: > > http://marc.info/?l=linux-usb&m=138116117104619&w=2 > Try applying them to the latest kernel and see if they fix your i

Re: xhci_hcd and Canon Lide 110 not playing well together

2013-12-13 Thread Holger Hans Peter Freyther
On Tue, May 28, 2013 at 07:40:57PM +0200, Holger Hans Peter Freyther wrote: Good Evening, > Is there a timeline when you think this could be fixed? I tried with 3.10.x and 3.12.5 and the symptoms remain the same. The first time it is working, the second time the scanning does not start.

Re: xhci_hcd and Canon Lide 110 not playing well together

2013-05-28 Thread Holger Hans Peter Freyther
On Mon, Oct 22, 2012 at 10:01:04AM -0700, Sarah Sharp wrote: Good Evening, > > Maybe Sarah can give you some pointers on where to look next. > > I've asked for a physical bus trace from one of our QA folks with the > same scanner. I think that will shed some light on whether this is a > host-si

Re: xhci_hcd and Canon Lide 110 not playing well together

2012-10-22 Thread Holger Hans Peter Freyther
On Mon, Oct 22, 2012 at 10:01:04AM -0700, Sarah Sharp wrote: Dear Sarah, > > Maybe Sarah can give you some pointers on where to look next. > > I've asked for a physical bus trace from one of our QA folks with the > same scanner. I think that will shed some light on whether this is a > host-side

Re: xhci_hcd and Canon Lide 110 not playing well together

2012-10-22 Thread Holger Hans Peter Freyther
On Mon, Oct 22, 2012 at 11:52:16AM -0400, Alan Stern wrote: > On Sun, 21 Oct 2012, Holger Hans Peter Freyther wrote: Dear Alan, thanks for having a look. > Did you connect the scanner to the computer with a USB-2 cable or a > USB-3 cable? Not that it's supposed to matter... I