> On Thu, 23 May 2019, Schmid, Carsten wrote: > > > Hi USB maintainers, > > > > we recently have seen a problem with usb-storage when trying to read > from a device. > > This happened on a 4.14.86 kernel. > > > > The kernel's dmesg shows: (log has been submitted via DLT) > > 1200.862250 kernel: usb 1-3.1: reset high-speed USB device number 10 > using xhci_hcd > > 1285.466289 kernel: usb 1-3.1: reset high-speed USB device number 10 > using xhci_hcd > > 1291.911286 kernel: usb-storage: Error in queuecommand_lck: us->srb = > ffff9d66b02e3528 > > 1292.018079 kernel: usb-storage: Error in queuecommand_lck: us->srb = > ffff9d66b02e3528 > > 1292.043073 kernel: usb-storage: Error in queuecommand_lck: us->srb = > ffff9d66b02e3528 > > 1292.069078 kernel: usb-storage: Error in queuecommand_lck: us->srb = > ffff9d66b02e3528 > > 1292.093066 kernel: usb-storage: Error in queuecommand_lck: us->srb = > ffff9d66b02e3528 > > Since there haven't been any substantive change to usb-storage since > 4.14 was released, there's a good chance this is a problem with > xhci-hcd. > > Is this problem repeatable? Can you collect a usbmon trace showing > what happens when the problem occurs? > Unfortunately this happened in the field on a test drive. I don't have access to the device. So, no, can't be reproduced by now. > > There has been a similar bug being fixed in 3.17 kernel series, maybe the > bug has been re-introduced? > > https://bugzilla.kernel.org/show_bug.cgi?id=88341 > > That is _extremely_ unlikely. > Looked into the history of that bug report. Strange: no fix is menioned. Reported: 2014-17-11 Remark on 2019-02-26 No hint to a real fix. It simply disappeared ... > > As USB seems to be the causing subsystem, i submit this query here. > > > > Any idea what could cause this? > > The particular error message you got means that the SCSI layer asked > usb-storage to send a command to the device before the previous command > was completed. But without more information there's no way to tell why > it did this. > > Alan Stern That's at least a hint i can forward to the vendor. Thanks Alan, Carsten
