Re: External USB disks not recognized with v6.1.8 when using Xen

["Linux kernel regression tracking (#adding)" <regressions@leemhuis.info>]

[TLDR: I'm adding this report to the list of tracked Linux kernel
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On 30.01.23 04:46, Christian Kujau wrote:
> [CC stable as I only tested the stable tree for now]
> 
> I'm running a current Alpine Linux with linux-edge-6.1.8-r0 installed on a 
> Lenovo Thinkpad L540 where an external disk enclosure with two disks is 
> attached via USB. The Alpine Linux kernel appears to track Linux stable 
> and is more or less vanilla. Also, the machine boots into Xen 4.17.0 and 
> then starts a few headless VMs, nothing too exotic here.
> 
> But when updating from Linux 6.1.1 to 6.1.8, the disks from the external 
> enclosure did not show up. Unplug, replug, no dice, and this is 100% 
> reproducable. dmesg has new these lines now:
> 
> +ioremap error for 0xf2520000-0xf2530000, requested 0x2, got 0x0
> +ioremap error for 0xf2520000-0xf2530000, requested 0x2, got 0x0
> +xhci_hcd 0000:00:14.0: init 0000:00:14.0 fail, -14
> +ioremap error for 0xfed1f000-0xfed20000, requested 0x2, got 0x0
> +iTCO_wdt iTCO_wdt.1.auto: ioremap failed for resource [mem 0xfed1f410-0xfed1f414]
> 
> I'm not sure if the ioremap error is related here (booted with 
> early_ioremap_debug but then dmesg was filled with WARNINGS for both 
> versions, so I disabled it again), but that xhci_hcd error looks 
> suspicious.
> 
> Curiously 6.1.8 works just fine when NOT booted via Xen. I booted into 
> Xen + vanilla 6.1.8 now and was able to reproduce this issue. Xen + 
> vanilla 6.1.1 works fine.

Thanks for the report. To be sure the issue doesn't fall through the
cracks unnoticed, I'm adding it to regzbot, the Linux kernel regression
tracking bot:

#regzbot ^introduced v6.1.1..v6.1.8
#regzbot title xen/usb(?): External USB disks not recognized anymore
under Xen
#regzbot ignore-activity

This isn't a regression? This issue or a fix for it are already
discussed somewhere else? It was fixed already? You want to clarify when
the regression started to happen? Or point out I got the title or
something else totally wrong? Then just reply and tell me -- ideally
while also telling regzbot about it, as explained by the page listed in
the footer of this mail.

Developers: When fixing the issue, remember to add 'Link:' tags pointing
to the report (the parent of this mail). See page linked in footer for
details.

> From v6.1.1 to v6.1.8 there's only one commit in drivers/xen, but 54 
> commits in drivers/usb. Compiling takes time because the distribution 
> kernel has almost everything enabled and I still need to cut down enabled 
> options to be able to attempt a git biset in a reasonable time,

FWIW, I'm working on a text for the kernel docs that will use
"localmodconfig" to trim down the configs automatically. Maybe it's
helpful for you, here is a draft:

https://www.leemhuis.info/files/misc/How%20to%20quickly%20build%20a%20Linux%20kernel%20%E2%80%94%20The%20Linux%20Kernel%20documentation.html

> but I 
> still wanted to report this, maybe someone has an idea about this.
> 
> Full dmesg and lshw outputs: https://nerdbynature.de/bits/usb_v6.1.8/
> 
> Thanks,
> Christian.
> 
> PS: I found this workaround on the interwebs[0] to force the USB ports 
> of that machine to USB 2.0 and then the missing disks magically appear:
> 
> $ lspci -nn | grep -i usb
> 00:14.0 USB controller [0c03]: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI [8086:8c31] (rev 05)  <=== !!!
> 00:1a.0 USB controller [0c03]: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 [8086:8c2d] (rev 05)
> 00:1d.0 USB controller [0c03]: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 [8086:8c26] (rev 05)
> 
> $ setpci -H1 -d 8086:8c31 d8.l=0
> $ setpci -H1 -d 8086:8c31 d0.l=0
> 
> $ dmesg 
> usb 1-1.3: new full-speed USB device number 3 using ehci-pci
> usb 2-1.3: new high-speed USB device number 3 using ehci-pci
> usb 1-1.3: New USB device found, idVendor=138a, idProduct=0011, bcdDevice=0.78
> usb 1-1.3: New USB device strings: Mfr=0, Product=0, SerialNumber=1
> usb 1-1.3: SerialNumber: aa32bf84ed47
> usb 1-1.5: new full-speed USB device number 4 using ehci-pci
> usb 2-1.3: New USB device found, idVendor=1e91, idProduct=a3a8, bcdDevice=2.07
> usb 2-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=5
> usb 2-1.3: Product: Elite Pro Dual
> usb 2-1.3: Manufacturer: OWC
> usb 2-1.3: SerialNumber: RANDOM__1E359879645F
> usb 2-1.3: UAS is ignored for this device, using usb-storage instead
> usb-storage 2-1.3:1.0: USB Mass Storage device detected
> usb-storage 2-1.3:1.0: Quirks match for vid 1e91 pid a3a8: 800000
> scsi host5: usb-storage 2-1.3:1.0
> usb 1-1.5: New USB device found, idVendor=8087, idProduct=07dc, bcdDevice=0.01
> usb 1-1.5: New USB device strings: Mfr=0, Product=0, SerialNumber=0
> Bluetooth: hci0: Legacy ROM 2.5 revision 8.0 build 1 week 45 2013
> Bluetooth: hci0: Intel Bluetooth firmware file: intel/ibt-hw-37.7.10-fw-1.80.1.2d.d.bseq
> usb 1-1.6: new high-speed USB device number 5 using ehci-pci
> usb 1-1.6: New USB device found, idVendor=04f2, idProduct=b398, bcdDevice=39.98
> usb 1-1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> usb 1-1.6: Product: Integrated Camera
> usb 1-1.6: Manufacturer: Vimicro corp.
> Bluetooth: hci0: Intel BT fw patch 0x2a completed & activated
> scsi 5:0:0:0: Direct-Access     ElitePro Dual U3FW-1      0207 PQ: 0 ANSI: 6
> scsi 5:0:0:1: Direct-Access     ElitePro Dual U3FW-2      0207 PQ: 0 ANSI: 6
> sd 5:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16).
> sd 5:0:0:0: [sdc] 7814037168 512-byte logical blocks: (4.00 TB/3.64 TiB)
> sd 5:0:0:1: [sdd] Very big device. Trying to use READ CAPACITY(16).
> sd 5:0:0:1: [sdd] 7814037168 512-byte logical blocks: (4.00 TB/3.64 TiB)
> sd 5:0:0:1: [sdd] Write Protect is off
> sd 5:0:0:1: [sdd] Mode Sense: 47 00 10 08
> sd 5:0:0:0: [sdc] Write Protect is off
> sd 5:0:0:0: [sdc] Mode Sense: 47 00 10 08
> sd 5:0:0:0: [sdc] No Caching mode page found
> sd 5:0:0:0: [sdc] Assuming drive cache: write through
> sd 5:0:0:1: [sdd] No Caching mode page found
> sd 5:0:0:1: [sdd] Assuming drive cache: write through
> sd 5:0:0:0: [sdc] Attached SCSI disk
> sd 5:0:0:1: [sdd] Attached SCSI disk
> 
> $ lsblk /dev/sd[cd]
> NAME MAJ:MIN RM  SIZE RO TYPE MOUNTPOINTS
> sdc    8:32   0  3.6T  0 disk 
> sdd    8:48   0  3.6T  0 disk 
> 
> 
> [0] https://superuser.com/a/875863/218574

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
--
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