Hi,
On 07-01-15 16:19, Alan Stern wrote:
On Tue, 6 Jan 2015, Taegil Bae wrote:
Hi all,
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=90791
My machine is Thinkpad Yoga with Onelink dock attached. Onelink dock
is a USB 3.0 dock functioning as a USB 3.0 hub. This has two USB 3.0
ports in front. I connected a USB HDD enclosure to one of those ports.
After use, I safely removed the storage device. But immediately that
storage is connected. There is no such issue for laptop body's USB 3.0
ports or Onelink dock's USB 2.0 ports.
I've tested in GNOME GUI and i3 CUI environment. In GNOME, I used
gnome-disk utility. In i3, I echo'ed 1 to that USB 3.0 enclosure
device's sysfs entry 'remove'. There is no difference.
Using Onelink dock's USB 3.0 port:
1월 05 22:25:51 rapunzel kernel: usb 3-3-port4: logical disconnect
<-- safely remove
1월 05 22:25:51 rapunzel kernel: hub 3-3:1.0: state 7 ports 4 chg 0010 evt 0000
1월 05 22:25:51 rapunzel kernel: usb 3-3-port4: status 02b0, change
0000, 5.0 Gb/s
1월 05 22:25:51 rapunzel kernel: usb 3-3.4: USB disconnect, device number 4
1월 05 22:25:51 rapunzel kernel: usb 3-3.4: unregistering device
1월 05 22:25:51 rapunzel kernel: hub 3-3:1.0: state 7 ports 4 chg 0000 evt 0010
1월 05 22:25:51 rapunzel kernel: usb 3-3-port4: reset change
1월 05 22:25:51 rapunzel kernel: usb 3-3-port4: warm reset change
1월 05 22:25:51 rapunzel kernel: usb 3-3-port4: status 0203, change
0031, 5.0 Gb/s
1월 05 22:25:51 rapunzel kernel: usb 3-3-port4: debounce total 100ms
stable 100ms status 0x203
1월 05 22:25:51 rapunzel kernel: usb 3-3.4: new SuperSpeed USB device
number 5 using xhci_hcd <-- reconnecting
1월 05 22:25:51 rapunzel kernel: usb 3-3.4: udev 5, busnum 3, minor = 260
1월 05 22:25:51 rapunzel kernel: usb-storage 3-3.4:1.0: USB Mass
Storage device detected
1월 05 22:25:51 rapunzel kernel: scsi host5: usb-storage 3-3.4:1.0
1월 05 22:25:51 rapunzel kernel: hub 3-3:1.0: state 7 ports 4 chg 0000 evt 0010
1월 05 22:25:52 rapunzel kernel: scsi 5:0:0:0: Direct-Access
Corsair Force 3 SSD 5.07 PQ: 0 ANSI: 0
1월 05 22:25:52 rapunzel kernel: sd 5:0:0:0: [sdb] 234441648 512-byte
logical blocks: (120 GB/111 GiB)
1월 05 22:25:52 rapunzel kernel: sd 5:0:0:0: [sdb] Write Protect is off
1월 05 22:25:52 rapunzel kernel: sd 5:0:0:0: [sdb] Mode Sense: 03 00 00 00
1월 05 22:25:52 rapunzel kernel: sd 5:0:0:0: [sdb] No Caching mode page found
1월 05 22:25:52 rapunzel kernel: sd 5:0:0:0: [sdb] Assuming drive
cache: write through
1월 05 22:25:52 rapunzel kernel: sdb: unknown partition table
1월 05 22:25:52 rapunzel kernel: sd 5:0:0:0: [sdb] Attached SCSI disk
1월 05 22:25:53 rapunzel kernel: BTRFS info (device sdb): disk space
caching is enabled
1월 05 22:25:53 rapunzel kernel: BTRFS: bdev /dev/sdb errs: wr 0, rd
1, flush 0, corrupt 0, gen 0
Clearly there's a bug in the SuperSpeed port-state logic in the hub
driver. Perhaps Hans can help fix the problems. If not, Mathias (the
xhci-hcd maintainer) may look at this after he gets back from vacation.
I'm afraid that I already have too much work on my plate, and that I'm not
100% into the code in question, so this will have to wait till Mathias is
back.
Regards,
Hans
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