netdev - [PATCH] net: irda: init spinlock after memcpy

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Message-ID: <alpine.LFD.2.00.0907271407590.2936@localhost.localdomain>
Date:	Mon, 27 Jul 2009 14:12:24 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	netdev@...r.kernel.org
cc:	David Miller <davem@...emloft.net>
Subject: [PATCH] net: irda: init spinlock after memcpy

From: Deepak Saxena <dsaxena@...sta.com>

irttp_dup() copies a tsap_cb struct, but does not initialize the
spinlock in the new structure, which confuses lockdep.

Signed-off-by: Deepak Saxena <dsaxena@...sta.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
diff --git a/net/irda/irttp.c b/net/irda/irttp.c
index ecf4eb2..9cb79f9 100644
--- a/net/irda/irttp.c
+++ b/net/irda/irttp.c
@@ -1453,6 +1453,7 @@ struct tsap_cb *irttp_dup(struct tsap_cb *orig, void *instance)
 	}
 	/* Dup */
 	memcpy(new, orig, sizeof(struct tsap_cb));
+	spin_lock_init(&new->lock);
 
 	/* We don't need the old instance any more */
 	spin_unlock_irqrestore(&irttp->tsaps->hb_spinlock, flags);
--
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