From: Ben Dooks <ben.dooks@codethink.co.uk>
To: Linux MMC List <linux-mmc@vger.kernel.org>
Cc: "Markku Ahvenjärvi" <markku.ahvenjarvi@nomovok.com>
Subject: 3.18 SDIO driver re-attach issue
Date: Wed, 10 Jun 2015 17:30:13 +0100 [thread overview]
Message-ID: <55786615.7020701@codethink.co.uk> (raw)
We are having an issue with 3.18 on an OMAP3517 and a TI WL1271
Wifi SDIO card attached to an hsmmc port. The module is powered
from the main 3.3/1.8V supply rails so cannot be powered down.
The wifi driver is built as a module, and when the module is
unloaded and then reloaded the driver attach fails. The issue
is sdio_bus_probe() calls the sdio_set_block_size(, func, 0)
which fails with -110 (ETIMEDOUT) on the second load.
Is it possible we need to either ignore the error, or try and
re-set the function when either the driver un-binds / if the
first sdio_set_block_size(, func, 0) call happens?
Currently we ignore the error and the wifi driver seems to be
working with the device. If there is a better fix then we would
like to know so it can be fixed properly up-stream.
--
Ben Dooks http://www.codethink.co.uk/
Senior Engineer Codethink - Providing Genius
next reply other threads:[~2015-06-10 16:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-10 16:30 Ben Dooks [this message]
2015-06-17 11:51 ` 3.18 SDIO driver re-attach issue Ulf Hansson
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