From: Maxim Levitsky <maximlevitsky@gmail.com>
Date: Mon, 22 Feb 2010 18:39:30 +0000 (+0200)
Subject: mtd: blktrans: Hotplug fixes
X-Git-Tag: v2.6.35-rc1~465^2~102
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=048d87199566663e4edc4880df3703c04bcf41d9;p=pandora-kernel.git

mtd: blktrans: Hotplug fixes

* 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>
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