IB/hfi1: Initialize bth1 in 16B rc ack builder

It is possible the bth1 variable could be used uninitialized so going
ahead and giving it a default value.

Otherwise we leak stack memory to the network.

Fixes: 5b6cabb0db77 ("IB/hfi1: Add 16B RC/UC support")
Reviewed-by: Don Hiatt <don.hiatt@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/infiniband/hw/hfi1/rc.c b/drivers/infiniband/hw/hfi1/rc.c
index fd01a760259f..af5f7936f7e5 100644
--- a/drivers/infiniband/hw/hfi1/rc.c
+++ b/drivers/infiniband/hw/hfi1/rc.c
@@ -814,7 +814,7 @@ static inline void hfi1_make_rc_ack_16B(struct rvt_qp *qp,
         struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
         struct hfi1_16b_header *hdr = &opa_hdr->opah;
         struct ib_other_headers *ohdr;
-        u32 bth0, bth1;
+        u32 bth0, bth1 = 0;
         u16 len, pkey;
         u8 becn = !!is_fecn;
         u8 l4 = OPA_16B_L4_IB_LOCAL;