RDMA/cxgb4: Protect from possible dereference
Smatch tool reports the following error: drivers/infiniband/hw/cxgb4/qp.c:1886 c4iw_create_qp() error: we previously assumed 'ucontext' could be null (see line 1804) Cc: Steve Wise <swise@opengridcomputing.com> Signed-off-by: NLeon Romanovsky <leon@kernel.org> Reviewed-by: NSteve Wise <swise@opengridcomputing.com> Signed-off-by: NDoug Ledford <dledford@redhat.com>
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