netdev - [patch] cxgb4: silence shift wrapping static checker warning

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Message-ID: <20140109053400.GF1265@elgon.mountain>
Date:	Thu, 9 Jan 2014 08:34:00 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Dimitris Michailidis <dm@...lsio.com>,
	Kumar Sanghvi <kumaras@...lsio.com>
Cc:	netdev@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [patch] cxgb4: silence shift wrapping static checker warning

I don't know how large "tp->vlan_shift" is but static checkers worry
about shift wrapping bugs here.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/net/ethernet/chelsio/cxgb4/l2t.c b/drivers/net/ethernet/chelsio/cxgb4/l2t.c
index cb05be905def..81e8402a74b4 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/l2t.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/l2t.c
@@ -423,7 +423,7 @@ u64 cxgb4_select_ntuple(struct net_device *dev,
 	 * in the Compressed Filter Tuple.
 	 */
 	if (tp->vlan_shift >= 0 && l2t->vlan != VLAN_NONE)
-		ntuple |= (F_FT_VLAN_VLD | l2t->vlan) << tp->vlan_shift;
+		ntuple |= (u64)(F_FT_VLAN_VLD | l2t->vlan) << tp->vlan_shift;
 
 	if (tp->port_shift >= 0)
 		ntuple |= (u64)l2t->lport << tp->port_shift;
--
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