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

Jason Gunthorpe
2018-05-14T18:03:41Z

On Mon, May 07, 2018 at 09:44:54AM +1000, Stephen Rothwell wrote:
> 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")
>

SteveW, is there a patch to fix this that I'm missing?

Thanks,
Jason