[patch] farsync: fix support for over 30 cards

Dan Carpenter
2012-10-09T07:20:48Z

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>
---
Static checker stuff. No one actually has over 30 of these cards... :P

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);
}