From 447b346e46c8a4b108448c91746512d5ad57e534 Mon Sep 17 00:00:00 2001
From: Maciej Sosnowski <maciej.sosnowski@intel.com>
Date: Wed, 23 May 2012 17:27:07 +0200
Subject: [PATCH] --- yaml --- r: 358499 b: refs/heads/master c:
 c419fcfd071cf34ba00f9f65282583772d2655e7 h: refs/heads/master i:   358497:
 1a8984174d8cdc359a3ad2c2b7bc6b95f4ffe87e   358495:
 fca891a4b47e5fe2a8940687f581a684cb2952de v: v3

---
 [refs]                       | 2 +-
 trunk/drivers/dca/dca-core.c | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 15fb60de7ffc..690812d08a67 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6decffd5f6afaf55722d9c85b8739621dca63d0f
+refs/heads/master: c419fcfd071cf34ba00f9f65282583772d2655e7
diff --git a/trunk/drivers/dca/dca-core.c b/trunk/drivers/dca/dca-core.c
index bc6f5faa1e9e..819dfda88236 100644
--- a/trunk/drivers/dca/dca-core.c
+++ b/trunk/drivers/dca/dca-core.c
@@ -420,6 +420,11 @@ void unregister_dca_provider(struct dca_provider *dca, struct device *dev)
 
 	raw_spin_lock_irqsave(&dca_lock, flags);
 
+	if (list_empty(&dca_domains)) {
+		raw_spin_unlock_irqrestore(&dca_lock, flags);
+		return;
+	}
+
 	list_del(&dca->node);
 
 	pci_rc = dca_pci_rc_from_dev(dev);