[patch v2] dca: remove unneeded NULL check

[Dan Carpenter]

The return here doesn't release the locks or re-enable IRQs.  But as
Andrew Morton points out, domain is never NULL.  list_first_entry() 
essentially never returns NULL and also we already verified that the
list is not empty. 

Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>

diff --git a/drivers/dca/dca-core.c b/drivers/dca/dca-core.c
index b98c676..c461eda 100644
--- a/drivers/dca/dca-core.c
+++ b/drivers/dca/dca-core.c
@@ -110,8 +110,6 @@ static void unregister_dca_providers(void)
 
 	/* at this point only one domain in the list is expected */
 	domain = list_first_entry(&dca_domains, struct dca_domain, node);
-	if (!domain)
-		return;
 
 	list_for_each_entry_safe(dca, _dca, &domain->dca_providers, node) {
 		list_del(&dca->node);
--
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