From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Mon, 8 Oct 2012 21:20:48 +0000 (+0000)
Subject: farsync: fix support for over 30 cards
X-Git-Tag: upstream/snapshot3+hdmi~6486^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=50fb47ae4d812d5eabc57539701dc0fd6404495e;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

farsync: fix support for over 30 cards

We're trying to fill a 64 bit bitmap but only the lower 30 shifts work
because the shift wraps around.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/wan/farsync.c b/drivers/net/wan/farsync.c
index 1a62318..b627132 100644
--- a/drivers/net/wan/farsync.c
+++ b/drivers/net/wan/farsync.c
@@ -597,7 +597,7 @@ fst_q_work_item(u64 * queue, int card_index)
 	 * bottom half for the card.  Note the limitation of 64 cards.
 	 * That ought to be enough
 	 */
-	mask = 1 << card_index;
+	mask = (u64)1 << card_index;
 	*queue |= mask;
 	spin_unlock_irqrestore(&fst_work_q_lock, flags);
 }