bnxt_re_alloc_mw() doesn't return NULL, it returns error pointers.
Fixes: 9152e0b722b2 ("RDMA/bnxt_re: HW workarounds for handling specific conditions")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
 
        /* Create a fence MW only for kernel consumers */
        mw = bnxt_re_alloc_mw(&pd->ib_pd, IB_MW_TYPE_1, NULL);
-       if (!mw) {
+       if (IS_ERR(mw)) {
                dev_err(rdev_to_dev(rdev),
                        "Failed to create fence-MW for PD: %p\n", pd);
-               rc = -EINVAL;
+               rc = PTR_ERR(mw);
                goto fail;
        }
        fence->mw = mw;