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mtd: blktrans: Hotplug fixes

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* Add locking where it was missing.

* Don't do a get_mtd_device in blktrans_open because it would lead to a
  deadlock; instead do that in add_mtd_blktrans_dev.

* Only free the mtd_blktrans_dev structure when the last user exits.

* Flush request queue on device removal.

* Track users, and call tr->release in del_mtd_blktrans_dev
  Due to that ->open and release aren't called more that once.

Now it is safe to call del_mtd_blktrans_dev while the device is still in use.

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Maxim Levitsky
2010-02-22 20:39:30 +02:00
committed by David Woodhouse
parent a863862257
commit 048d871995
9 changed files with 148 additions and 59 deletions
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drivers/mtd/ftl.c
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@@ -1082,7 +1082,6 @@ static void ftl_remove_dev(struct mtd_blktrans_dev *dev)
{
del_mtd_blktrans_dev(dev);
ftl_freepart((partition_t *)dev);
kfree(dev);
}
static struct mtd_blktrans_ops ftl_tr = {