From: "José María Fernández González" <josemariafg@gmail.com>
To: Pierre Ossman <drzeus-list@drzeus.cx>
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] mmc: Some microSD cards are not recognized by PCIxx12 SDA controller
Date: Tue, 07 Apr 2009 01:30:28 +0200 [thread overview]
Message-ID: <49DA9094.1070803@gmail.com> (raw)
In-Reply-To: <20090405203317.72ce6aff@mjolnir.ossman.eu>
It is curious. I have concentrated my tests on 2.6.29 with HZ=100 and no preemption, and I have done next tests with my microSD card and laptop:
* mmc_delay(2) -> FAIL
* mdelay(2) -> FAIL
* mmc_delay(10) -> Works!
* mdelay(10) -> Works!
And by mistake I found that:
* msleep(2) -> Works!
Best Regards,
José María
Pierre Ossman wrote:
>
> All of them will result in a sleep though. Preferably, I'd like to now
> the minimum delay you need to get things working. Change from
> mmc_delay() to mdelay() to make sure there aren't any sleeps (which
> generally take quite some time to complete).
>
> Rgds
next prev parent reply other threads:[~2009-04-06 23:30 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-10 1:21 [PATCH 1/1] mmc: Some microSD cards are not recognized by PCIxx12 SDA controller José María Fernández González
2009-03-24 20:17 ` Pierre Ossman
2009-03-25 8:00 ` José María Fernández González
2009-03-25 16:17 ` Pierre Ossman
2009-03-26 16:37 ` José María Fernández González
2009-04-05 18:33 ` Pierre Ossman
2009-04-06 23:30 ` José María Fernández González [this message]
2009-04-10 21:35 ` Pierre Ossman
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