cxgb4: potential shift wrapping bug

"cntxt_id" is an unsigned int but "udb" is a u64 so there is a potential
shift wrapping bug here.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c b/drivers/net/ethernet/chelsio/cxgb4/sge.c
index bb7851e0b4c6..e8e90ce3ae15 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c
@@ -2258,7 +2258,7 @@ static u64 udb_address(struct adapter *adap, unsigned int cntxt_id,
                 (QUEUESPERPAGEPF1 - QUEUESPERPAGEPF0) * adap->fn);
         udb_density = 1 << ((qpp >> s_qpp) & QUEUESPERPAGEPF0_MASK);
         qpshift = PAGE_SHIFT - ilog2(udb_density);
-        udb = cntxt_id << qpshift;
+        udb = (u64)cntxt_id << qpshift;
         udb &= PAGE_MASK;
         page = udb / PAGE_SIZE;
         udb += (cntxt_id - (page * udb_density)) * SGE_UDB_SIZE;