[Bug 15950] New: Hang in dc395x driver

[Bug 15950] New: Hang in dc395x driver

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=15950

           Summary: Hang in dc395x driver
           Product: SCSI Drivers
           Version: 2.5
    Kernel Version: 2.6.31
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: DC395X
        AssignedTo: scsi_drivers-dc395x@kernel-bugs.osdl.org
        ReportedBy: ltskinol@gmail.com
        Regression: Yes


Kernel 2.6.31 and at least some earlier kernels.

I'm using an old Microtek ScanMaker flatbed scanner connected to a DC395x SCSI
card.

dc395x 0000:01:07.0: PCI INT A -> Link[APC2] -> GSI 17 (level, low) -> IRQ 17
dc395x: Used settings: AdapterID=07, Speed=0(20.0MHz), dev_mode=0x57
dc395x:                AdaptMode=0x0f, Tags=4(16), DelayReset=1s
dc395x: Connectors: ext50  Termination: Auto Low High 
dc395x: Performing initial SCSI bus reset
scsi0 : Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040 v2.05, 2004/03/08
scsi 0:0:6:0: Scanner                    Scanner          1.80 PQ: 0 ANSI: 4
CCS
scsi 0:0:6:0: Attached scsi generic sg0 type 6
sata_nv 0000:00:05.0: version 3.5

When scanning with xsane, after a few minutes I often get a hang in xsane and
if I forcibly kill xsane, the scanner is no longer there.  When the xsane hang
occurs, I see this:

dc395x: reselect: w/o disconnected cmds <06-0>
dc395x: disconnect: Unexpected reselection <06-0>

I'm not sure when this problem started, but it's somewhere in the 2.6.2x
region.

I'd be happy to recompile, test and debug if needed.

Thanks,
Tom

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Re: [Bug 15950] New: Hang in dc395x driver

[James Bottomley]

On Sun, 2010-05-09 at 21:19 +0000, bugzilla-daemon@bugzilla.kernel.org
wrote:
> I'm not sure when this problem started, but it's somewhere in the 2.6.2x
> region.
> 
> I'd be happy to recompile, test and debug if needed.

Retesting isn't necessary.  There have only been nine changes to that
driver in 2.6.2x.  The versions of interest (as in works/doesn't work)
should be

2.6.26 (should be identical to 2.6.31, so just a something else changed
sanity check)
2.6.25 (lots of pointless changes + sense buffer replacement)
2.6.34 (pid removal and sg chaining)
2.6.23 (accessors change)
2.6.22 (spelling only fix!)

James

[Bug 15950] Hang in dc395x driver

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=15950





--- Comment #1 from Anonymous Emailer <anonymous@kernel-bugs.osdl.org>  2010-05-09 22:07:58 ---
Reply-To: James.Bottomley@suse.de

On Sun, 2010-05-09 at 21:19 +0000, bugzilla-daemon@bugzilla.kernel.org
wrote:
> I'm not sure when this problem started, but it's somewhere in the 2.6.2x
> region.
> 
> I'd be happy to recompile, test and debug if needed.

Retesting isn't necessary.  There have only been nine changes to that
driver in 2.6.2x.  The versions of interest (as in works/doesn't work)
should be

2.6.26 (should be identical to 2.6.31, so just a something else changed
sanity check)
2.6.25 (lots of pointless changes + sense buffer replacement)
2.6.34 (pid removal and sg chaining)
2.6.23 (accessors change)
2.6.22 (spelling only fix!)

James

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[Bug 15950] Hang in dc395x driver

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=15950





--- Comment #2 from ltskinol@gmail.com  2010-05-10 04:16:03 ---
I downloaded the .1 versions of kernel's 2.6.22 through 2.6.26, and
found that 2.6.25 and above had no changes in the dc395x.c file, but
that a variety of changes were introduced in 2.6.24 and below.  Since
the older dc395x.c doesn't drop into my current 2.6.31 kernel, I tried
recompiling and running 2.6.24 without success.  On Gentoo, the
current udev doesn't work with that older kernel, so things like
networking and X fail to run properly and I was unable to test the
scanner.  Suggestions?

Tom

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Re: [Bug 15950] Hang in dc395x driver

[Guennadi Liakhovetski]

On Mon, 10 May 2010, bugzilla-daemon@bugzilla.kernel.org wrote:

> I downloaded the .1 versions of kernel's 2.6.22 through 2.6.26, and
> found that 2.6.25 and above had no changes in the dc395x.c file, but
> that a variety of changes were introduced in 2.6.24 and below.  Since
> the older dc395x.c doesn't drop into my current 2.6.31 kernel, I tried
> recompiling and running 2.6.24 without success.  On Gentoo, the
> current udev doesn't work with that older kernel, so things like
> networking and X fail to run properly and I was unable to test the
> scanner.  Suggestions?

You can use the command-line sane interface scanimage (from the sane-utils 
package).

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/

[Bug 15950] Hang in dc395x driver

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=15950





--- Comment #3 from ltskinol@gmail.com  2010-05-10 05:14:36 ---
On Sun, May 9, 2010 at 6:07 PM,  <bugzilla-daemon@bugzilla.kernel.org> wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=15950
>
>
>
>
>
> --- Comment #1 from Anonymous Emailer <anonymous@kernel-bugs.osdl.org>  2010-05-09 22:07:58 ---
> Reply-To: James.Bottomley@suse.de
>
> On Sun, 2010-05-09 at 21:19 +0000, bugzilla-daemon@bugzilla.kernel.org
> wrote:
>> I'm not sure when this problem started, but it's somewhere in the 2.6.2x
>> region.
>>
>> I'd be happy to recompile, test and debug if needed.
>
> Retesting isn't necessary.  There have only been nine changes to that
> driver in 2.6.2x.  The versions of interest (as in works/doesn't work)
> should be
>
> 2.6.26 (should be identical to 2.6.31, so just a something else changed
> sanity check)
> 2.6.25 (lots of pointless changes + sense buffer replacement)
> 2.6.34 (pid removal and sg chaining)
> 2.6.23 (accessors change)
> 2.6.22 (spelling only fix!)
>
> James
>
> --
> Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email
> ------- You are receiving this mail because: -------
> You reported the bug.
>

I downloaded the .1 versions of kernel's 2.6.22 through 2.6.26, and
found that 2.6.25 and above had no changes in the dc395x.c file, but
that a variety of changes were introduced in 2.6.24 and below.  Since
the older dc395x.c doesn't drop into my current 2.6.31 kernel, I tried
recompiling and running 2.6.24 without success.  On Gentoo, the
current udev doesn't work with that older kernel, so things like
networking and X fail to run properly and I was unable to test the
scanner.  Suggestions?

Tom

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[Bug 15950] Hang in dc395x driver

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=15950





--- Comment #4 from Guennadi Liakhovetski <g.liakhovetski@gmx.de>  2010-05-10 19:59:25 ---
On Mon, 10 May 2010, bugzilla-daemon@bugzilla.kernel.org wrote:

> I downloaded the .1 versions of kernel's 2.6.22 through 2.6.26, and
> found that 2.6.25 and above had no changes in the dc395x.c file, but
> that a variety of changes were introduced in 2.6.24 and below.  Since
> the older dc395x.c doesn't drop into my current 2.6.31 kernel, I tried
> recompiling and running 2.6.24 without success.  On Gentoo, the
> current udev doesn't work with that older kernel, so things like
> networking and X fail to run properly and I was unable to test the
> scanner.  Suggestions?

You can use the command-line sane interface scanimage (from the sane-utils 
package).

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/

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[Bug 15950] Hang in dc395x driver

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=15950


ltskinol@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Regression|Yes                         |No




--- Comment #5 from ltskinol@gmail.com  2010-05-16 03:49:14 ---
Guennadi - good call.

I was able to go back to kernel 2.6.22.1 (through 2.6.25/24/23) and all
versions exhibit the same behavior.  With the command-line scanimage software,
I eventually see an error returned and the driver resets after a two minute
delay.

I've removed the regression flag from this bug, but still think there's a
problem.

Tom

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[Bug 15950] Hang in dc395x driver

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=15950

Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |alan@lxorguk.ukuu.org.uk
         Resolution|---                         |OBSOLETE

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[Bug 15950] Hang in dc395x driver

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https://bugzilla.kernel.org/show_bug.cgi?id=15950

ltskinol@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|OBSOLETE                    |---

--- Comment #6 from ltskinol@gmail.com ---
Reopening.  Not obsolete.  Reproduceable in 3.5.3, which is what I'm using at
present.  (I can upgrade to a newer version if need-be.)

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[Bug 15950] Hang in dc395x driver

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=15950

Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Kernel Version|2.6.31                      |3.5.3

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[Bug 15950] Hang in dc395x driver

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https://bugzilla.kernel.org/show_bug.cgi?id=15950

--- Comment #7 from Alan <alan@lxorguk.ukuu.org.uk> ---
No need - there is one obscure bug fix in early 2013, but nothing else since
2010. You may be the only person on the planet who still uses one!

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[Bug 15950] Hang in dc395x driver

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https://bugzilla.kernel.org/show_bug.cgi?id=15950

--- Comment #8 from ltskinol@gmail.com ---
Could be.  Haven't found another inexpensive SCSI adapter.

I say the driver probably needs to get fixed or removed, though.  No point in
having it in the kernel giving folks false hope that it'll work!

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