Subject: linux-next: build warning after merge of the rdma tree

From: Stephen Rothwell <[email-masked]>
Date: Mon, 7 May 2018 09:44:54 +1000

Hi all,

After merging the rdma tree, today's linux-next build (x86_64
allmodconfig) produced this warning:

drivers/infiniband/hw/cxgb4/restrack.c: In function 'fill_res_qp_entry':
drivers/infiniband/hw/cxgb4/restrack.c:140:6: warning: 'last_rq_idx' may be used uninitialized in this function [-Wmaybe-uninitialized]
  if (rdma_nl_put_driver_u32(msg, "idx", idx))
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/infiniband/hw/cxgb4/restrack.c:180:20: note: 'last_rq_idx' was declared here
  u16 first_rq_idx, last_rq_idx;
                    ^~~~~~~~~~~
drivers/infiniband/hw/cxgb4/restrack.c:140:6: warning: 'first_rq_idx' may be used uninitialized in this function [-Wmaybe-uninitialized]
  if (rdma_nl_put_driver_u32(msg, "idx", idx))
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/infiniband/hw/cxgb4/restrack.c:180:6: note: 'first_rq_idx' was declared here
  u16 first_rq_idx, last_rq_idx;
      ^~~~~~~~~~~~
drivers/infiniband/hw/cxgb4/restrack.c:228:6: warning: 'last_sq_idx' may be used uninitialized in this function [-Wmaybe-uninitialized]
  if (fill_swsqes(msg, &wq.sq, first_sq_idx, fsp, last_sq_idx, lsp))
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/infiniband/hw/cxgb4/restrack.c:228:6: warning: 'first_sq_idx' may be used uninitialized in this function [-Wmaybe-uninitialized]

Introduced by commit

  056f9c7f39bf ("iw_cxgb4: dump detailed driver-specific QP information")

-- 
Cheers,
Stephen Rothwell