lkml.org 
[lkml]   [2003]   [Jun]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: [BUG] ieee1394 sbp2 driver is broken for kernel >= 2.4.21-rc2
    From
    Date
    On Tue, 2003-06-03 at 20:54, Ben Collins wrote:
    > > First, I never trust hotplug or other tools like this:
    > > I do all insmod by hand, so I know all drivers have been loaded.
    > > What is hotplug supposed to do (but wasn't in previous driver
    > > version...) ?
    >
    > I didn't say CONFIG_HOTPLUG, I said hotplug. Basically SCSI in 2.4 will
    > not let recognize devices that were not present when the scsi-host was
    > initially registered with the SCSI stack. You have to run
    > rescan-scsi-bus.sh (or manually send the add/remove commands via
    > procfs).
    >
    > Please read the linux-kernel and/or linux1394-devel mailing list
    > archives. I really hate dredging this all up again.

    Well, I did understand well hotplug...
    I did read what's said about SBP2 on linux1394.org, BUT:

    please read my latest mail, I did some try with the 2.4.21-rc1 ieee1394
    stack, without /sbin/hotplug, and it worked.
    I have neither rescan-scsi-bus.sh, nor scsiadd anywhere on this machine.
    So, I'm sure that no user-space tool have been called by the kernel.

    - I NEVER need to do an "echo ... > /proc/scsi/scsi" to see the device
    (I tell again that I never use automatic tools to do this kind of
    low level stuffs).
    - I NEVER have to do this to see an USB mass-storage device:
    I'm *REALLY* sure of this, as I wrote a very simple hotplug
    and automounter for some embedded hardware which uses USB mass
    storage devices. So, I don't see why SBP2 should need this...

    - Please take a look at this session:
    First, I reboot the Ibook:

    root:~$ reboot
    root:~$
    Broadcast message from root (pts/0) (Tue Jun 3 22:06:13 2003):

    The system is going down for reboot NOW!
    Connection to mac closed by remote host.
    Connection to mac closed.
    jma ~ > ssh jocelyn@mac
    jocelyn@mac's password:
    jocelyn:~$ su -
    Password:
    root:~$ ls -l /bin/hotplug
    ls: /bin/hotplug: No such file or directory
    root:/lib/modules/2.4.21-rc6-compat/kernel/drivers/ieee1394$ cat
    /proc/sys/kernel/hotplug
    /sbin/hotplug
    root:~$ cd /lib/modules/2.4.21-rc6-compat/kernel/drivers/ieee1394/
    root:/lib/modules/2.4.21-rc6-compat/kernel/drivers/ieee1394$ insmod
    ./ieee1394.o

    root:/lib/modules/2.4.21-rc6-compat/kernel/drivers/ieee1394$ insmod
    ./cmp.o
    root:/lib/modules/2.4.21-rc6-compat/kernel/drivers/ieee1394$ cat
    /proc/scsi/scsi

    Attached devices:
    Host: scsi0 Channel: 00 Id: 00 Lun: 00
    Vendor: SONY Model: CD-RW CRX800E Rev: 1.3p
    Type: CD-ROM ANSI SCSI revision: 02
    root:/lib/modules/2.4.21-rc6-compat/kernel/drivers/ieee1394$ insmod
    ./ohci1394.o

    root:/lib/modules/2.4.21-rc6-compat/kernel/drivers/ieee1394$ insmod
    ./amdtp.o
    root:/lib/modules/2.4.21-rc6-compat/kernel/drivers/ieee1394$ insmod
    ../scsi/sd_m
    od.o
    root:/lib/modules/2.4.21-rc6-compat/kernel/drivers/ieee1394$ insmod
    ./sbp2.o
    root:/lib/modules/2.4.21-rc6-compat/kernel/drivers/ieee1394$ cat
    /proc/scsi/scsi

    Attached devices:
    Host: scsi0 Channel: 00 Id: 00 Lun: 00
    Vendor: SONY Model: CD-RW CRX800E Rev: 1.3p
    Type: CD-ROM ANSI SCSI revision: 02
    Host: scsi1 Channel: 00 Id: 00 Lun: 00
    Vendor: Maxtor 6 Model: Y080L0 Rev: YAR4
    Type: Direct-Access ANSI SCSI revision: 06


    So I NEVER write anything to /proc/scsi/scsi,
    I got NO /sbin/hotplug, I use only insmod,
    so I can have no side-effect due to modprobe usage,
    and it works PERFECTLY on the Ibook,
    using the 2.4.21-rc1 ieee1394 stack.

    So, I'm sorry, but I keep thinking the new driver is buggy:
    what used to work and doesn't...


    Regards.

    --
    Jocelyn Mayer <jma@netgem.com>

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:36    [W:0.028 / U:6.280 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site