linux-kernel - Re: [Cbe-oss-dev] [regression/bisected] corrupt CD data after media change and delay

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Message-ID: <5a4c581d0806210718m77be63c9l444d8d7d7a5266bd@mail.gmail.com>
Date:	Sat, 21 Jun 2008 16:18:15 +0200
From:	"Alessandro Suardi" <alessandro.suardi@...il.com>
To:	"Geert Uytterhoeven" <Geert.Uytterhoeven@...ycom.com>
Cc:	"James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
	linux-scsi@...r.kernel.org,
	"Linux Kernel Development" <linux-kernel@...r.kernel.org>,
	"Maarten Bressers" <mbres@...too.org>,
	"Daniel Drake" <dsd@...too.org>,
	"Cell Broadband Engine OSS Development" <cbe-oss-dev@...abs.org>
Subject: Re: [Cbe-oss-dev] [regression/bisected] corrupt CD data after media change and delay

[dropped David Martin from CC: list as I get permanent delivery errors]

On Wed, Jun 18, 2008 at 2:15 PM, Alessandro Suardi
<alessandro.suardi@...il.com> wrote:
> On Wed, Jun 18, 2008 at 1:13 PM, Geert Uytterhoeven
> <Geert.Uytterhoeven@...ycom.com> wrote:
>> On Wed, 18 Jun 2008, Alessandro Suardi wrote:
>>> On Fri, Jun 13, 2008 at 7:33 PM, Geert Uytterhoeven
>>> <Geert.Uytterhoeven@...ycom.com> wrote:
>>> > On Fri, 6 Jun 2008, Geert Uytterhoeven wrote:
>>> >> When mounting a CD/DVD more than 30 seconds after inserting it, and reading
>>> >> from it, we get:
>>> >
>>> > Apparently the fix didn't make it to all the CCed lists...
>>> >
>>> > http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Fjejb%2Fscsi-rc-fixes-2.6.git;a=commitdiff_plain;h=d1daeabf0da5bfa1943272ce508e2ba785730bf0
>>>
>>> Oh, that's in mainline ? I still have the problem of having to
>>
>> Not yet, it's in the scsi-rc-fixes-2.6 tree.
>>
>>>  insert DVD / try accessing it and get errors / eject / re-insert
>>>  and then it magically works... the messages have changed
>>>  from what they were as reported here
>>>
>>> http://bugzilla.kernel.org/show_bug.cgi?id=10116
>>>
>>>  (see comments #8 and #9) to these ones, in 2.6.26-rc6-git4:
>>>
>>> Jun 17 22:38:43 sandman kernel: sr 1:0:0:0: [sr0] Result:
>>> hostbyte=0x00 driverbyte=0x08
>>> Jun 17 22:38:43 sandman kernel: sr 1:0:0:0: [sr0] Sense Key : 0x3 [current]
>>> Jun 17 22:38:43 sandman kernel: sr 1:0:0:0: [sr0] ASC=0x11 ASCQ=0x0
>>> Jun 17 22:38:43 sandman kernel: end_request: I/O error, dev sr0, sector 232
>>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 29
>>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 30
>>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 31
>>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 32
>>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 33
>>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 34
>>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 35
>>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 36
>>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 37
>>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 38
>>>
>>> here I eject and reinsert the disc, and:
>>>
>>> Jun 17 22:39:10 sandman kernel: UDF-fs: No VRS found
>>>
>>>  lo and behold, no problem.
>>>
>>> This does not, alas, happen every time. It might be at the first
>>>  DVD access after booting the laptop, but I haven't investigated
>>>  in this detail yet.
>>
>> Does /sys/block/sr0/size reflect the correct size of the DVD?
>>
>> Did you try applying the patch?
>
> ATM I'm away from home (as usual), I'll post back when
>  I have the info you asked for and tried applying the
>  above patch. Thanks !

Sigh. I haven't been able to reproduce the problem once since
 I posted this. Will keep trying...

--alessandro

 "Give me love / Or give me hate
 Give me anything that's not just ok"

 (Sophia, 'Weightless')
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