Hello Potnuri Bharat Teja,
The patch 94245f4ad9e1: "iw_cxgb4: Support FW write completion WR"
from Aug 2, 2018, leads to the following static checker warning:
drivers/infiniband/hw/cxgb4/qp.c:651 build_rdma_write_cmpl()
error: uninitialized symbol 'plen'.
drivers/infiniband/hw/cxgb4/qp.c
636 wcwr->r3 = 0;
637
638 /* SEND_INV SGL */
639 if (wr->next->send_flags & IB_SEND_INLINE)
640 build_immd_cmpl(sq, &wcwr->u_cmpl.immd_src, wr->next);
641 else
642 build_isgl((__be64 *)sq->queue, (__be64 *)&sq->queue[sq->size],
643 &wcwr->u_cmpl.isgl_src, wr->next->sg_list, 1, NULL);
644
645 /* WRITE SGL */
646 build_isgl((__be64 *)sq->queue, (__be64 *)&sq->queue[sq->size],
647 wcwr->u.isgl_src, wr->sg_list, wr->num_sge, &plen);
^^^^^
Smatch thinks build_isgl() can return -EMSGSIZE
648
649 size = sizeof(*wcwr) + sizeof(struct fw_ri_isgl) +
650 wr->num_sge * sizeof(struct fw_ri_sge);
651 wcwr->plen = cpu_to_be32(plen);
652 *len16 = DIV_ROUND_UP(size, 16);
regards,
dan carpenter
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