msi_db_mask is of type 'u64', still the standard 'int' arithmetic is performed to compute its value.
While most of the ntb_hw drivers actually don't utilize the higher 32 bits of the doorbell mask now, this may be the case for Switchtec - see switchtec_ntb_init_db().
Found by Linux Verification Center (linuxtesting.org) with SVACE static analysis tool.
Fixes: 2b0569b3b7e6 ("NTB: Add MSI interrupt support to ntb_transport") Cc: stable@vger.kernel.org Signed-off-by: Fedor Pchelkin pchelkin@ispras.ru --- drivers/ntb/ntb_transport.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c index a22ea4a4b202..4f775c3e218f 100644 --- a/drivers/ntb/ntb_transport.c +++ b/drivers/ntb/ntb_transport.c @@ -1353,7 +1353,7 @@ static int ntb_transport_probe(struct ntb_client *self, struct ntb_dev *ndev) qp_count = ilog2(qp_bitmap); if (nt->use_msi) { qp_count -= 1; - nt->msi_db_mask = 1 << qp_count; + nt->msi_db_mask = BIT_ULL(qp_count); ntb_db_clear_mask(ndev, nt->msi_db_mask); }