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[PATCH] mmc: use own work queue

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The MMC layer uses the standard work queue for doing card detection.  As this
queue is shared with other crucial subsystems, the effects of a long (and
perhaps buggy) detection can cause the system to be unusable.  E.g.  the
keyboard stops working while the detection routine is running.

The solution is to add a specific mmc work queue to run the detection code in.
This is similar to how other subsystems handle detection (a full kernel
thread is the most common theme).

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Pierre Ossman
2006-10-04 02:15:41 -07:00
committed by Linus Torvalds
parent 8a4da1430f
commit 7104e2d5a8
3 changed files with 41 additions and 4 deletions
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6
drivers/mmc/mmc.c
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@ -1166,9 +1166,9 @@ static void mmc_setup(struct mmc_host *host)
void mmc_detect_change(struct mmc_host *host, unsigned long delay)
{
if (delay)
schedule_delayed_work(&host->detect, delay);
mmc_schedule_delayed_work(&host->detect, delay);
else
schedule_work(&host->detect);
mmc_schedule_work(&host->detect);
}
EXPORT_SYMBOL(mmc_detect_change);
@ -1311,7 +1311,7 @@ EXPORT_SYMBOL(mmc_remove_host);
*/
void mmc_free_host(struct mmc_host *host)
{
flush_scheduled_work();
mmc_flush_scheduled_work();
mmc_free_host_sysfs(host);
}