Re: xHCI problem? [was Re: Erratic USB device behavior and device loss]

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Hello Mathias,

Can you please confirm of the erratic behavior we've discussed so far, on this
thread ?

It'd help to know if it really is a bug or something else.


On Fri, 2016-08-12 at 11:48 -0400, Alan Stern wrote:
> On Fri, 12 Aug 2016, Ritesh Raj Sarraf wrote:
> 
> > So I booted into Windows 8.1 and tried to access an SDCard over the Card
> Reader.
> > I was able to see the drive and read the content in it.
> > I did check for relevant messages in the Windows Event Log but couldn't find
> anything relevant.
>
> > Then I tried the same under Linux and ran into some more descriptive errors.
> > Please note that these errors were seen while running on AC Power.
>
> > I seem to be getting too many of these errors, too frequently, like every 10
> seconds.
> > Please note that in this email's log, what you see is with a SDCard inserted
> into the reader,
> > whereas the last email's errors were without any SDCard.
>
> > If you think this could be a bug, maybe this should be created as a bugzilla
> ?
> 
> That wouldn't help.  USB bugs are handled on the mailing list, not on 
> Bugzilla.  If you did create a Bugzilla report, you would simply be 
> told to post it on the mailing list.
> 
> > rrs@learner:~$ dmesg | grep _hcd
> > [    2.156424] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> > [    2.179325] xhci_hcd 0000:00:14.0: xHCI Host Controller
> > [    2.179334] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus
> number 1
> > [    2.180733] xhci_hcd 0000:00:14.0: hcc params 0x200077c1 hci version
> 0x100 quirks 0x0004b810
> > [    2.180747] xhci_hcd 0000:00:14.0: cache line size of 64 is not supported
> > [    2.186450] xhci_hcd 0000:00:14.0: xHCI Host Controller
> > [    2.186456] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus
> number 2
> > [    2.201115] usb usb3: Manufacturer: Linux 4.7.0bfqv8r2+ ehci_hcd
> > [    2.544358] usb 1-4: new high-speed USB device number 2 using xhci_hcd
> > [    2.877726] usb 1-5: new full-speed USB device number 3 using xhci_hcd
> > [    3.211084] usb 1-6: new high-speed USB device number 4 using xhci_hcd
> > [    3.587708] usb 1-7: new full-speed USB device number 5 using xhci_hcd
> > [    3.921093] usb 1-8: new full-speed USB device number 6 using xhci_hcd
> > [  128.718593] xhci_hcd 0000:00:14.0: dev 4 ep1out scatterlist error -104/-
> 110
> > [  265.894197] xhci_hcd 0000:00:14.0: dev 4 ep1out scatterlist error -104/-
> 110
> > [  285.841249] xhci_hcd 0000:00:14.0: dev 4 ep1out scatterlist error -104/-
> 110
> 
> > and the non-grepped output, that affects the block device and its file
> system.
>
> > [  365.286055] xhci_hcd 0000:00:14.0: dev 4 ep1out scatterlist error -104/-
> 110
> > [  368.886974] mmcblk0: error -110 sending status command, retrying
> > [  369.486748] mmcblk0: error -110 sending status command, retrying
> > [  370.086769] mmcblk0: error -110 sending status command, aborting
> > [  372.489237] JBD2: recovery failed
> > [  372.489239] mmc0: card 0001 removed
> > [  372.489246] EXT4-fs (mmcblk0p2): error loading journal
> > [  373.919190] mmc0: new ultra high speed SDR50 SDHC card at address 0001
> > [  373.919447] mmcblk0: mmc0:0001 00000 7.44 GiB 
> > [  373.921308]  mmcblk0: p1 p2
> > [  374.100604] FAT-fs (mmcblk0p1): utf8 is not a recommended IO charset for
> FAT filesystems, filesystem will be case sensitive!
> > [  374.123828] FAT-fs (mmcblk0p1): Volume was not properly unmounted. Some
> data may be corrupt. Please run fsck.
> > [  385.206927] xhci_hcd 0000:00:14.0: dev 4 ep1out scatterlist error -104/-
> 110
> > [  388.807534] mmcblk0: error -110 sending status command, retrying
> > [  389.407732] mmcblk0: error -110 sending status command, retrying
> > [  390.007416] mmcblk0: error -110 sending status command, aborting
> > [  392.410267] mmc0: card 0001 removed
> > [  392.410271] JBD2: recovery failed
> > [  392.410275] EXT4-fs (mmcblk0p2): error loading journal
> > [  393.718948] mmc0: new ultra high speed SDR50 SDHC card at address 0001
> > [  393.719200] mmcblk0: mmc0:0001 00000 7.44 GiB 
> > [  393.721232]  mmcblk0: p1 p2
> > [  393.895994] FAT-fs (mmcblk0p1): utf8 is not a recommended IO charset for
> FAT filesystems, filesystem will be case sensitive!
> > [  393.918883] FAT-fs (mmcblk0p1): Volume was not properly unmounted. Some
> data may be corrupt. Please run fsck.
> > [  404.994319] xhci_hcd 0000:00:14.0: dev 4 ep1out scatterlist error -104/-
> 110
> > [  408.594951] mmcblk0: error -110 sending status command, retrying
> > [  409.195091] mmcblk0: error -110 sending status command, retrying
> > [  409.794964] mmcblk0: error -110 sending status command, aborting
> > [  412.199751] mmc0: card 0001 removed
> > [  412.199929] JBD2: recovery failed
> > [  412.199936] EXT4-fs (mmcblk0p2): error loading journal
> > [  413.627050] mmc0: new ultra high speed SDR50 SDHC card at address 0001
> > [  413.627337] mmcblk0: mmc0:0001 00000 7.44 GiB 
> > [  413.629286]  mmcblk0: p1 p2
> > [  413.803223] FAT-fs (mmcblk0p1): utf8 is not a recommended IO charset for
> FAT filesystems, filesystem will be case sensitive!
> > [  413.829698] FAT-fs (mmcblk0p1): Volume was not properly unmounted. Some
> data may be corrupt. Please run fsck.
> 
> These could indicate some sort of problem with the driver for the xHCI
> controller.  However, I'm not an expert on xhci-hcd.  Mathias is the
> maintainer for that driver.
> 
> Alan Stern
> 
- -- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
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