linux-kernel - Re: [regression] Re: 2.6.26-rc6: pcmcia stopped working

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Message-ID: <20080706123530.GA1862@elf.ucw.cz>
Date:	Sun, 6 Jul 2008 14:35:30 +0200
From:	Pavel Machek <pavel@...e.cz>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc:	kernel list <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [regression] Re: 2.6.26-rc6: pcmcia stopped working

On Sun 2008-07-06 00:46:31, Pavel Machek wrote:
> Hi!
> 
> > > > > Hmm, hitting sysrq-w produces no blocked task until I eject pcmcia
> > > > > card. Backtrace there is:
> > > > > 
> > > > > Greg, I believe some traces lead to sysfs, can you help here?
> > > > 
> > > > ide_unregister() does not complete :-(.
> > > > 
> > > >         device_unregister(&hwif->gendev);
> > > > +       printk("ide_unregister: waiting for rel_comp\n");
> > > >         wait_for_completion(&hwif->gendev_rel_comp);
> > > > 
> > > > ...that wait_for_completion never returns.
> > 
> > [...]
> > 
> > Thanks for narrowing it down to wait_for_completion() call,
> > it was an useful hint.

Patched version seems to work here, thanks.

Tested-by: Pavel Machek <pavel@...e.cz>

There's still some funny stuff going on: Trying to free nonexistent
resource <> seems to indicate a code problem somewhere, and "hdc:
set_geometry_intr: error" is slightly scary, but the flash card seems
to work ok.
								Pavel

PM: Resume from disk failed.
Probing IDE interface ide1...
hdc: SunDisk SDP3B-20, CFA DISK drive
hdd: SunDisk SDP3B-20, CFA DISK drive
ide-probe: ignoring undecoded slave
ide1 at 0x9100-0x9107,0x910e on irq 16
hdc: max request size: 128KiB
hdc: 40960 sectors (20 MB) w/1KiB Cache, CHS=640/2/32
 hdc:hdc: set_geometry_intr: status=0x51 { DriveReady SeekComplete
Error }
hdc: set_geometry_intr: error=0x04 { DriveStatusError }
ide: failed opcode was: unknown
 hdc1 hdc3
ide-cs: hdc: Vpp = 0.0
md: Autodetecting RAID arrays.
md: Scanned 0 and added 0 devices.
md: autorun ...
md: ... autorun DONE.
...
Failure of coda_cnode_make for root: error -4
pccard: card ejected from slot 0
Trying to free nonexistent resource <000000000000910e-000000000000910e>
Trying to free nonexistent resource <0000000000009100-0000000000009107>
pccard: PCMCIA card inserted into slot 0
pcmcia: registering new device pcmcia0.0
Probing IDE interface ide1...
hdc: SunDisk SDP3B-20, CFA DISK drive
hdd: SunDisk SDP3B-20, CFA DISK drive
ide-probe: ignoring undecoded slave
ide1 at 0x9100-0x9107,0x910e on irq 16
hdc: max request size: 128KiB
hdc: 40960 sectors (20 MB) w/1KiB Cache, CHS=640/2/32
 hdc:hdc: set_geometry_intr: status=0x51 { DriveReady SeekComplete Error }
hdc: set_geometry_intr: error=0x04 { DriveStatusError }
ide: failed opcode was: unknown
 hdc1 hdc3
ide-cs: hdc: Vpp = 0.0
Clocksource tsc unstable (delta = -63722496 ns)

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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