* Freitag, 31. August 2007 um 16:56 (-0400) schrieb Alan Stern:
>
> All those reset messages are caused by a bug in the device. Every
> command sent to the device is labelled with a "Tag" value; it shows up
> in the debugging log on each "Bulk Command" line as the number
> following the T. For example:
>
> Bulk Command S 0x43425355 T 0x4 L 18 F 128 Trg 0 LUN 0 CL 6
>
> Here the Tag is 0x4. In its status response, the device must include a
> matching Tag value to indicate which command the status is for. If you
> look at the debugging log, you'll see the status line for this
> particular command was:
>
> Bulk Status S 0x53425355 T 0x3 R 0 Stat 0x0
>
> The Tag is 0x3, which doesn't match! The device made this mistake 15
> times in 410 commands, apparently at random, and each time the computer
> issued a reset to try and fix the problem. That's a pretty serious
> bug in the Z6.
>
> If you want to work around this bug, you can edit the file
> drivers/usb/storage/transport.c. In the usb_stor_Bulk_transport()
> routine, edit this line:
>
> if (bcs->Tag != us->tag || bcs->Status > US_BULK_STAT_PHASE) {
>
> and change it to:
>
> if (bcs->Status > US_BULK_STAT_PHASE) {
I' done this, too.
The non-debug-messages are now:
----------------------------------------------------------------------------
Sep 1 13:09:17 kocom kernel: usb 3-1: new high speed USB device using ehci_hcd
and address 12
Sep 1 13:09:17 kocom kernel: usb 3-1: configuration #1 chosen from 1 choice
Sep 1 13:09:17 kocom kernel: Initializing USB Mass Storage driver...
Sep 1 13:09:17 kocom kernel: scsi7 : SCSI emulation for USB Mass Storage
devices
Sep 1 13:09:17 kocom kernel: usb-storage: device found at 12
Sep 1 13:09:17 kocom kernel: usb-storage: waiting for device to settle before
scanning
Sep 1 13:09:17 kocom kernel: usbcore: registered new interface driver
usb-storage
Sep 1 13:09:17 kocom kernel: USB Mass Storage support registered.
Sep 1 13:09:22 kocom kernel: usb-storage: device scan complete
Sep 1 13:09:22 kocom kernel: scsi 7:0:0:0: Direct-Access Motorola MSnc.
PQ: 1 ANSI: 0 CCS
Sep 1 13:09:22 kocom kernel: scsi 7:0:0:1: Direct-Access Motorola MSnc.
PQ: 1 ANSI: 0 CCS
Sep 1 13:09:22 kocom kernel: sd 7:0:0:0: [sdb] Attached SCSI removable disk
Sep 1 13:09:22 kocom kernel: sd 7:0:0:0: Attached scsi generic sg2 type 0
Sep 1 13:09:22 kocom kernel: sd 7:0:0:1: [sdc] Attached SCSI removable disk
Sep 1 13:09:22 kocom kernel: sd 7:0:0:1: Attached scsi generic sg3 type 0
Sep 1 13:09:28 kocom kernel: sd 7:0:0:0: [sdb] 1983495 512-byte hardware
sectors (1016 MB)
Sep 1 13:09:28 kocom kernel: sd 7:0:0:0: [sdb] Write Protect is off
Sep 1 13:09:28 kocom kernel: sd 7:0:0:0: [sdb] Mode Sense: 03 00 00 00
Sep 1 13:09:28 kocom kernel: sd 7:0:0:0: [sdb] Assuming drive cache: write
through
Sep 1 13:09:28 kocom kernel: sd 7:0:0:0: [sdb] 1983495 512-byte hardware
sectors (1016 MB)
Sep 1 13:09:28 kocom kernel: sd 7:0:0:0: [sdb] Write Protect is off
Sep 1 13:09:28 kocom kernel: sd 7:0:0:0: [sdb] Mode Sense: 03 00 00 00
Sep 1 13:09:28 kocom kernel: sd 7:0:0:0: [sdb] Assuming drive cache: write
through
Sep 1 13:09:28 kocom kernel: sdb:
Sep 1 13:09:28 kocom kernel: sd 7:0:0:1: [sdc] 128673 512-byte hardware
sectors (66 MB)
Sep 1 13:09:28 kocom kernel: sd 7:0:0:1: [sdc] Write Protect is off
Sep 1 13:09:28 kocom kernel: sd 7:0:0:1: [sdc] Mode Sense: 03 00 00 00
Sep 1 13:09:28 kocom kernel: sd 7:0:0:1: [sdc] Assuming drive cache: write
through
Sep 1 13:09:28 kocom kernel: sd 7:0:0:1: [sdc] 128673 512-byte hardware
sectors (66 MB)
Sep 1 13:09:28 kocom kernel: sd 7:0:0:1: [sdc] Write Protect is off
Sep 1 13:09:28 kocom kernel: sd 7:0:0:1: [sdc] Mode Sense: 03 00 00 00
Sep 1 13:09:28 kocom kernel: sd 7:0:0:1: [sdc] Assuming drive cache: write
through
Sep 1 13:09:28 kocom kernel: sdc:
Sep 1 13:09:59 kocom kernel: usb 3-1: reset high speed USB device using
ehci_hcd and address 12
Sep 1 13:10:14 kocom kernel: usb 3-1: device descriptor read/64, error -110
Sep 1 13:10:29 kocom kernel: usb 3-1: device descriptor read/64, error -110
Sep 1 13:10:29 kocom kernel: usb 3-1: reset high speed USB device using
ehci_hcd and address 12
Sep 1 13:10:44 kocom kernel: usb 3-1: device descriptor read/64, error -110
Sep 1 13:11:00 kocom kernel: usb 3-1: device descriptor read/64, error -110
Sep 1 13:11:00 kocom kernel: usb 3-1: reset high speed USB device using
ehci_hcd and address 12
Sep 1 13:11:05 kocom kernel: usb 3-1: device descriptor read/8, error -110
------------------------------------------------------------------------------------------------
sdb and sdc appear in /proc/partitions, but trying to access with 'fdisk -l` or
'mount' freezes the phone.
I uploaded the debug-log to:
<http://www.akoenecke.de/moto/usb_debug2.txt>
The debug-log included 2 spontaneous reboots and 1 freeze (in this order) of
the phone without unplugging.
Andreas
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