Hello Naresh Gottumukkala,
The patch 7c33880c3cb2: "RDMA/ocrdma: Add support for fast register
work requests (FRWR)" from Aug 26, 2013, leads to the following
warning:
"drivers/infiniband/hw/ocrdma/ocrdma_verbs.c:1986 ocrdma_build_fr()
warn: impossible condition '(wr->wr.fast_reg.length > 4294967295) =>
(0-u32max > u32max)'"
drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
1974 static int ocrdma_build_fr(struct ocrdma_qp *qp, struct ocrdma_hdr_wqe
*hdr,
1975 struct ib_send_wr *wr)
1976 {
1977 u64 fbo;
1978 struct ocrdma_ewqe_fr *fast_reg = (struct ocrdma_ewqe_fr *)(hdr
+ 1);
1979 struct ocrdma_mr *mr;
1980 u32 wqe_size = sizeof(*fast_reg) + sizeof(*hdr);
1981
1982 wqe_size = roundup(wqe_size, OCRDMA_WQE_ALIGN_BYTES);
1983
1984 if ((wr->wr.fast_reg.page_list_len >
1985 qp->dev->attr.max_pages_per_frmr) ||
1986 (wr->wr.fast_reg.length > 0xffffffffULL))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This condition can never be true.
1987 return -EINVAL;
1988
1989 hdr->cw |= (OCRDMA_FR_MR << OCRDMA_WQE_OPCODE_SHIFT);
1990 hdr->cw |= ((wqe_size / OCRDMA_WQE_STRIDE) <<
OCRDMA_WQE_SIZE_SHIFT);
1991
regards,
dan carpenter
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