Comment # 2 on bug 1195813 from 
(In reply to Takashi Iwai from comment #1)
> Is the problem reproduced after the clean reboot?  If it's a regression, we
> may try to find out the culprit change, but it can be fixed only if the
> issue is reproducible.

Unfortunately the problem was repeatable. Even more: This time the kernel
paniced.
Unfortunately I don't have the panic message; I just noted everything frozen
and the keyboard LEDs blinking.
The sequence was:
1) Connect an card reader with card to USB, then remove the card from the
reader (Linux does not notice).
2) Insert another card into the reader (Linux notices), then eject the card and
remove the reader then.
3) Connect USB stick to the same port and try blkid on it. The command takes
very long. The PC freezes.
4) unplug and re-plug the stick

(1: Connect UHS-II SD USB 3.1 reader with SDXC card)
Feb 12 00:39:31 pc7 kernel: usb 4-4: new SuperSpeed Gen 1 USB device number 2
using xhci_hcd
Feb 12 00:39:31 pc7 kernel: usb 4-4: New USB device found, idVendor=0781,
idProduct=cfd2, bcdDevice= 0.06
Feb 12 00:39:31 pc7 kernel: usb 4-4: New USB device strings: Mfr=3, Product=4,
SerialNumber=2
Feb 12 00:39:31 pc7 kernel: usb 4-4: Product: SDDR-399
Feb 12 00:39:31 pc7 kernel: usb 4-4: Manufacturer: SanDisk
Feb 12 00:39:31 pc7 kernel: usb 4-4: SerialNumber: 012345678900
Feb 12 00:39:31 pc7 kernel: usb-storage 4-4:1.0: USB Mass Storage device
detected
Feb 12 00:39:31 pc7 kernel: scsi host7: usb-storage 4-4:1.0

Feb 12 00:39:32 pc7 kernel: sd 7:0:0:0: Attached scsi generic sg6 type 0
Feb 12 00:39:33 pc7 kernel: sd 7:0:0:0: [sdf] 121536512 512-byte logical
blocks: (62.2 GB/58.0 GiB)
Feb 12 00:39:33 pc7 kernel: sd 7:0:0:0: [sdf] Write Protect is off
Feb 12 00:39:33 pc7 kernel: sd 7:0:0:0: [sdf] Mode Sense: 21 00 00 00
Feb 12 00:39:33 pc7 kernel: sd 7:0:0:0: [sdf] Write cache: disabled, read
cache: enabled, doesn't support DPO or FUA
Feb 12 00:39:33 pc7 kernel:  sdf: sdf1
Feb 12 00:39:33 pc7 kernel: sd 7:0:0:0: [sdf] Attached SCSI removable disk

(remove SDXC card, insert SDHC card)
Feb 12 00:42:07 pc7 kernel: sd 7:0:0:0: [sdf] 31116288 512-byte logical blocks:
(15.9 GB/14.8 GiB)
Feb 12 00:42:07 pc7 kernel:  sdf: sdf1

(eject card with reader)
Feb 12 00:42:56 pc7 kernel: sdf: detected capacity change from 15931539456 to 0
Feb 12 00:43:04 pc7 kernel: usb 4-4: USB disconnect, device number 2

(Plug in USB stick and try to read from block device /dev/sdf)
Feb 12 00:43:58 pc7 kernel: usb 4-4: new SuperSpeed Gen 1 USB device number 3
using xhci_hcd
Feb 12 00:43:58 pc7 kernel: usb 4-4: New USB device found, idVendor=18a5,
idProduct=0252, bcdDevice=11.00
Feb 12 00:43:58 pc7 kernel: usb 4-4: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
Feb 12 00:43:58 pc7 kernel: usb 4-4: Product: STORE N GO
Feb 12 00:43:58 pc7 kernel: usb 4-4: Manufacturer: Verbatim
Feb 12 00:43:58 pc7 kernel: usb 4-4: SerialNumber: 1234567890123456
Feb 12 00:43:58 pc7 kernel: usb-storage 4-4:1.0: USB Mass Storage device
detected
Feb 12 00:43:58 pc7 kernel: scsi host7: usb-storage 4-4:1.0

Feb 12 00:43:59 pc7 kernel: scsi 7:0:0:0: Direct-Access     Verbatim STORE N GO
      1100 PQ: 0 ANSI: 6
Feb 12 00:43:59 pc7 kernel: scsi 7:0:0:0: alua: supports implicit and explicit
TPGS
Feb 12 00:43:59 pc7 kernel: scsi 7:0:0:0: alua: No target port descriptors
found
Feb 12 00:43:59 pc7 kernel: sd 7:0:0:0: Attached scsi generic sg6 type 0
Feb 12 00:43:59 pc7 kernel: sd 7:0:0:0: [sdf] 123750400 512-byte logical
blocks: (63.4 GB/59.0 GiB)
Feb 12 00:43:59 pc7 kernel: sd 7:0:0:0: [sdf] Write Protect is off
Feb 12 00:43:59 pc7 kernel: sd 7:0:0:0: [sdf] Mode Sense: 43 00 00 00
Feb 12 00:43:59 pc7 kernel: sd 7:0:0:0: [sdf] Write cache: enabled, read cache:
enabled, doesn't support DPO or FUA
Feb 12 00:43:59 pc7 kernel:  sdf: sdf1 sdf2
Feb 12 00:43:59 pc7 kernel: sd 7:0:0:0: [sdf] Attached SCSI removable disk
Feb 12 00:44:35 pc7 kernel: usb 4-4: Disable of device-initiated U1 failed.
Feb 12 00:44:40 pc7 kernel: usb 4-4: Disable of device-initiated U2 failed.
Feb 12 00:44:45 pc7 kernel: xhci_hcd 0000:00:14.0: Timeout while waiting for
setup device command
Feb 12 00:44:51 pc7 kernel: xhci_hcd 0000:00:14.0: Timeout while waiting for
setup device command
Feb 12 00:44:51 pc7 kernel: usb 4-4: device not accepting address 3, error -62
Feb 12 00:44:51 pc7 kernel: usb 4-4: Device not responding to setup address.
Feb 12 00:44:51 pc7 kernel: usb 4-4: Device not responding to setup address.
Feb 12 00:44:52 pc7 kernel: usb 4-4: device not accepting address 3, error -71
Feb 12 00:44:52 pc7 kernel: usb 4-4: Device not responding to setup address.
Feb 12 00:44:52 pc7 kernel: usb 4-4: Device not responding to setup address.
Feb 12 00:44:52 pc7 kernel: usb 4-4: device not accepting address 3, error -71
Feb 12 00:44:53 pc7 kernel: usb 4-4: Device not responding to setup address.
Feb 12 00:44:53 pc7 kernel: usb 4-4: Device not responding to setup address.
Feb 12 00:44:53 pc7 kernel: usb 4-4: device not accepting address 3, error -71
Feb 12 00:44:53 pc7 kernel: usb 4-4: USB disconnect, device number 3
Feb 12 00:44:53 pc7 kernel: sd 7:0:0:0: [sdf] tag#0 FAILED Result:
hostbyte=DID_TIME_OUT driverbyte=DRIVER_OK
Feb 12 00:44:53 pc7 kernel: sd 7:0:0:0: [sdf] tag#0 CDB: Read(10) 28 00 07 60
47 fc 00 00 01 00
Feb 12 00:44:53 pc7 kernel: blk_update_request: I/O error, dev sdf, sector
123750396 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0
Feb 12 00:44:53 pc7 kernel: blk_update_request: I/O error, dev sdf, sector
123750392 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Feb 12 00:44:53 pc7 kernel: Buffer I/O error on dev sdf, logical block
15468799, async page read
(aborted read command, unplug stick, the replug it)
Feb 12 00:44:53 pc7 kernel: usb 4-4: Device not responding to setup address.
Feb 12 00:44:53 pc7 kernel: usb 4-4: Device not responding to setup address.
Feb 12 00:44:54 pc7 kernel: usb 4-4: device not accepting address 4, error -71
Feb 12 00:44:54 pc7 kernel: usb 4-4: Device not responding to setup address.
Feb 12 00:44:54 pc7 kernel: usb 4-4: Device not responding to setup address.
Feb 12 00:44:54 pc7 kernel: usb 4-4: device not accepting address 5, error -71
Feb 12 00:44:54 pc7 kernel: usb usb4-port4: attempt power cycle
Feb 12 00:44:55 pc7 kernel: usb 4-4: Device not responding to setup address.
Feb 12 00:44:55 pc7 kernel: usb 4-4: Device not responding to setup address.
Feb 12 00:44:56 pc7 kernel: usb 4-4: device not accepting address 6, error -71
Feb 12 00:44:56 pc7 kernel: usb 4-4: Device not responding to setup address.
Feb 12 00:44:56 pc7 kernel: usb 4-4: Device not responding to setup address.
Feb 12 00:44:56 pc7 kernel: usb 4-4: device not accepting address 7, error -71
Feb 12 00:44:56 pc7 kernel: usb usb4-port4: unable to enumerate USB device
Feb 12 00:45:25 pc7 kernel: usb 4-4: new SuperSpeed Gen 1 USB device number 8
using xhci_hcd
Feb 12 00:45:25 pc7 kernel: usb 4-4: New USB device found, idVendor=18a5,
idProduct=0252, bcdDevice=11.00
Feb 12 00:45:25 pc7 kernel: usb 4-4: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
Feb 12 00:45:25 pc7 kernel: usb 4-4: Product: STORE N GO
Feb 12 00:45:25 pc7 kernel: usb 4-4: Manufacturer: Verbatim
Feb 12 00:45:25 pc7 kernel: usb 4-4: SerialNumber: 1234567890123456
Feb 12 00:45:25 pc7 kernel: usb-storage 4-4:1.0: USB Mass Storage device
detected
Feb 12 00:45:25 pc7 kernel: scsi host7: usb-storage 4-4:1.0

Feb 12 00:45:26 pc7 kernel: scsi 7:0:0:0: Direct-Access     Verbatim STORE N GO
      1100 PQ: 0 ANSI: 6
Feb 12 00:45:26 pc7 kernel: scsi 7:0:0:0: alua: supports implicit and explicit
TPGS
Feb 12 00:45:26 pc7 kernel: scsi 7:0:0:0: alua: No target port descriptors
found
Feb 12 00:45:26 pc7 kernel: sd 7:0:0:0: Attached scsi generic sg6 type 0
Feb 12 00:45:26 pc7 kernel: sd 7:0:0:0: [sdf] 123750400 512-byte logical
blocks: (63.4 GB/59.0 GiB)
Feb 12 00:45:26 pc7 kernel: sd 7:0:0:0: [sdf] Write Protect is off
Feb 12 00:45:26 pc7 kernel: sd 7:0:0:0: [sdf] Mode Sense: 43 00 00 00
Feb 12 00:45:26 pc7 kernel: sd 7:0:0:0: [sdf] Write cache: enabled, read cache:
enabled, doesn't support DPO or FUA
Feb 12 00:45:26 pc7 kernel:  sdf: sdf1 sdf2
Feb 12 00:45:26 pc7 kernel: sd 7:0:0:0: [sdf] Attached SCSI removable disk
(that was the last message logged)

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