get registration_mutex at free_pseudo

Make sure that the call to dahdi_chan_unreg() in free_pseudo() is
protected by the registration_mutex, like the other calls to that
function.

Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Acked-By: Oron Peled <oron.peled@xorcom.com>
Acked-by: Shaun Ruffell <sruffell@digium.com>

git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10056 a0bf4364-ded3-4de4-8d8a-66a801d63aff

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/dahdi/dahdi-base.c b/drivers/dahdi/dahdi-base.c
index 01931ad..1ea92f6 100644
--- a/drivers/dahdi/dahdi-base.c
+++ b/drivers/dahdi/dahdi-base.c
@@ -3065,6 +3065,7 @@ static void dahdi_free_pseudo(struct dahdi_chan *chan)
 	if (!chan)
 		return;
 
+	mutex_lock(&registration_mutex);
 	pseudo = chan_to_pseudo(chan);
 
 	spin_lock_irqsave(&chan_lock, flags);
@@ -3073,6 +3074,7 @@ static void dahdi_free_pseudo(struct dahdi_chan *chan)
 	spin_unlock_irqrestore(&chan_lock, flags);
 
 	dahdi_chan_unreg(chan);
+	mutex_unlock(&registration_mutex);
 	kfree(pseudo);
 }