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mmc: fix rmmod race for hosts using card-detection polling

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commit d9bcbf343e upstream.

MMC hosts that poll for card detection by defining the MMC_CAP_NEEDS_POLL
flag have a race on rmmod, where the delayed work is cancelled without
waiting for completed polling. To prevent this a _sync version of the work
cancellation has to be used.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Guennadi Liakhovetski
2010-11-11 17:32:25 +01:00
committed by Greg Kroah-Hartman
parent c39b87a710
commit 7bfb0a0a1c
1 changed files with 1 additions and 1 deletions
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2
drivers/mmc/core/core.c
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@@ -1514,7 +1514,7 @@ void mmc_stop_host(struct mmc_host *host)
if (host->caps & MMC_CAP_DISABLE)
cancel_delayed_work(&host->disable);
cancel_delayed_work(&host->detect);
cancel_delayed_work_sync(&host->detect);
mmc_flush_scheduled_work();
/* clear pm flags now and let card drivers set them as needed */