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    SubjectRe: [BUG] 2.6.24-git usb reset problems
    On Tue, Jan 29, 2008 at 07:39:11PM +0100, Jens Axboe wrote:
    > On Tue, Jan 29 2008, Jens Axboe wrote:
    > > On Tue, Jan 29 2008, Oliver Neukum wrote:
    > > > Am Dienstag, 29. Januar 2008 15:11:08 schrieb Jens Axboe:
    > > > > On Tue, Jan 29 2008, Boaz Harrosh wrote:
    > > > > > On Tue, Jan 29 2008 at 15:54 +0200, Jens Axboe <jens.axboe@oracle.com> wrote:
    > > > > > > On Tue, Jan 29 2008, Boaz Harrosh wrote:
    > > > > > >> Greg KH wrote:
    > > >
    > > > > > > No difference, still just a lot of resets.
    > > > > > >
    > > > > > Where you able to figure out which usb storage transport is used?
    > > > > >
    > > > > > in drivers/usb/storage/usb.c you have get_protocol() and get_transport()
    > > > > > functions. I'm not sure if these get stored in sysfs perhaps. This will
    > > > > > pinpoint better where to look. Let me research a bit.
    > > > >
    > > > > Did the quick'n easy and dumped it. Protocol is 'Transparent SCSI' and
    > > > > transport is 'Bulk'
    > > >
    > > > You can recompile your kernel with CONFIG_USB_DEBUG and CONFIG_STORAGE_DEBUG
    > > > That should tell the reason for the resets.
    > >
    > > Sure, I'll do that. Will post the results tonight.
    >
    > OK, fresh boot with CONFIG_USB_DEBUG and CONFIG_STORAGE_DEBUG. Plugged
    > in the device, waited 10 seconds or so and pulled it out. These are the
    > messages.
    >
    > It all looks good until the MODE_SENSE command, where it only transfers
    > 4 of 192 bytes.

    No, that's not the problem. This is the problem:

    > usb-storage: *** thread awakened.
    > usb-storage: Command TEST_UNIT_READY (6 bytes)
    > usb-storage: 00 00 00 00 00 00
    > usb-storage: Bulk Command S 0x43425355 T 0xd L 0 F 0 Trg 0 LUN 1 CL 6
    > usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes
    > usb-storage: Status code 0; transferred 31/31
    > usb-storage: -- transfer complete
    > usb-storage: Bulk command transfer result=0
    > usb-storage: Attempting to get CSW...
    > usb-storage: usb_stor_bulk_transfer_buf: xfer 13 bytes
    > usb-storage: Status code 0; transferred 13/13
    > usb-storage: -- transfer complete
    > usb-storage: Bulk status result = 0
    > usb-storage: Bulk Status S 0x53425355 T 0xd R 0 Stat 0x1
    > usb-storage: -- transport indicates command failure
    > usb-storage: Issuing auto-REQUEST_SENSE
    > usb-storage: Bulk Command S 0x43425355 T 0xe L 18 F 128 Trg 0 LUN 1 CL 6
    > usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes
    > usb-storage: Status code 0; transferred 31/31
    > usb-storage: -- transfer complete
    > usb-storage: Bulk command transfer result=0
    > usb-storage: usb_stor_bulk_transfer_sglist: xfer 18 bytes, 1 entries
    > usb-storage: usb_sg_init returned -22
    > usb-storage: Bulk data transfer result 0x4
    > usb-storage: -- auto-sense failure
    > usb-storage: storage_pre_reset
    > ehci_hcd 0000:00:1d.7: port 1 high speed
    > ehci_hcd 0000:00:1d.7: GetStatus port 1 status 001005 POWER sig=se0 PE CONNECT
    > usb 5-1: reset high speed USB device using ehci_hcd and address 2
    > ehci_hcd 0000:00:1d.7: port 1 high speed
    > ehci_hcd 0000:00:1d.7: GetStatus port 1 status 001005 POWER sig=se0 PE CONNECT
    > usb-storage: storage_post_reset
    > usb-storage: usb_reset_composite_device returns 0
    > usb-storage: scsi cmd done, result=0x70000
    > usb-storage: *** thread sleeping.

    For some reason, usb_sg_init is boned during auto-sense.

    Matt

    --
    Matthew Dharm Home: mdharm-usb@one-eyed-alien.net
    Maintainer, Linux USB Mass Storage Driver

    It was a new hope.
    -- Dust Puppy
    User Friendly, 12/25/1998
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