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From: Alex Dubov <oakad@yahoo.com>
To: Pierre Ossman <drzeus-mmc@drzeus.cx>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Recent and not-so problems with tifm_sd driver
Date: Sun, 18 Feb 2007 15:48:22 -0800 (PST)	[thread overview]
Message-ID: <64677.73649.qm@web36711.mail.mud.yahoo.com> (raw)
In-Reply-To: <45D86C7B.5050900@drzeus.cx>

> > This is hard to trigger problem, so I'll spare you the rather lengthy log.
> > It happens if card timeouts and mmc_remove_host is called while mmc_register_card is still in
> > progress (the hint was in crash dump). If I sleep before remove, it gives the
> mmc_register_card
> > chance to finish/mark card as dead and everything's fine.
> > The remove callback of mmc_block is apparently not executed in this case (probably because
> device
> > has not finished registering).
> 
> Let's see, you manage to call mmc_remove_host() when a detection is pending in
> the workqueue? That could indeed generate new request (up until mmc_free_host()
> is called), but as the card is removed the mmc layer shouldn't be able to detect
> anything, hence mmc_block should never get involved.
> 

You'll agree, I think, that add_disk in mmc_block_probe issues a lot of requests (reads partition
table, fs superblocks and such - plenty of room for critical errors). Then, driver's remove method
will not be called before driver's probe method had finished. So mmc_block is quite involved, even
though it does not affect the problem's resolution.

Besides this, I have a new version of the tifm driver to submit. It fixes quite a few problems and
improves performance a little. Hopefully, it's better tested than the previous one.





 
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  reply	other threads:[~2007-02-18 23:48 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-07 22:20 [2.6.20] tifm_7xx1/mmc not working Andreas Steinmetz
2007-02-08  5:59 ` Pierre Ossman
2007-02-08 23:35   ` Alex Dubov
2007-02-09 12:27     ` Andreas Steinmetz
2007-02-09 15:14   ` Recent and not-so problems with tifm_sd driver Alex Dubov
2007-02-09 19:10     ` Pierre Ossman
2007-02-10  9:12       ` Recent and not-so problems with tifm_sd driver - one more Alex Dubov
2007-02-10 13:01         ` Pierre Ossman
2007-02-11  6:03           ` Brad Campbell
2007-02-11 14:52             ` Fabio Comolli
2007-02-11 15:40             ` Pierre Ossman
2007-02-11 15:56               ` Brad Campbell
2007-02-11 18:04                 ` Pierre Ossman
2007-02-11 19:32                   ` Brad Campbell
2007-02-12  9:14                     ` Pierre Ossman
2007-02-12 10:50                       ` Brad Campbell
2007-02-12 13:21                     ` Andreas Steinmetz
2007-02-17 15:16                   ` [mmc] incorrect behavior on resume Alex Dubov
2007-02-17 23:35                     ` Pierre Ossman
2007-02-18  0:29                       ` Pavel Machek
2007-02-18  1:46                         ` Alex Dubov
2007-02-18  6:53                           ` Russell King
2007-02-18 12:18                             ` Alex Dubov
2007-02-11  4:47       ` Recent and not-so problems with tifm_sd driver Alex Dubov
2007-02-11 18:15         ` Pierre Ossman
2007-02-12 11:53           ` Alex Dubov
2007-02-12 13:49             ` Pierre Ossman
2007-02-13  0:44               ` Alex Dubov
2007-02-13 14:40               ` Alex Dubov
2007-02-17 23:14                 ` Pierre Ossman
2007-02-17 23:51             ` Pierre Ossman
2007-02-18  4:59               ` Alex Dubov
2007-02-18  8:13                 ` Pierre Ossman
2007-02-18 14:19                   ` Alex Dubov
2007-02-18 15:10                     ` Pierre Ossman
2007-02-18 23:48                       ` Alex Dubov [this message]
2007-02-19  7:06                         ` Pierre Ossman
2007-02-19 12:09                           ` Alex Dubov
2007-02-19 12:34                             ` Pierre Ossman
2007-02-20  1:30                               ` Alex Dubov
2007-02-20  7:03                                 ` Pierre Ossman
2007-03-14 14:44                               ` Weird MMC errors: 1 of 2 - bad ocr value Alex Dubov
2007-04-08 19:41                                 ` Pierre Ossman

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