RDMA/irdma: Return error on MR deregister CQP failure

The MR deregister CQP can fail if an MW is bound to it.
Return an appropriate error for this case.

Fixes: b48c24c ("RDMA/irdma: Implement device supported verb APIs")
Signed-off-by: Sindhu-Devale <sindhu.devale@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Link: https://lore.kernel.org/r/20220906223244.1119-3-shiraz.saleem@intel.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

Author: Sindhu-Devale

drivers/infiniband/hw/irdma/utils.c

@@ -590,11 +590,14 @@ static int irdma_wait_event(struct irdma_pci_f *rf,
 	cqp_error = cqp_request->compl_info.error;
 	if (cqp_error) {
 		err_code = -EIO;
-		if (cqp_request->compl_info.maj_err_code == 0xFFFF &&
-		    cqp_request->compl_info.min_err_code == 0x8029) {
-			if (!rf->reset) {
-				rf->reset = true;
-				rf->gen_ops.request_reset(rf);
+		if (cqp_request->compl_info.maj_err_code == 0xFFFF) {
+			if (cqp_request->compl_info.min_err_code == 0x8002)
+				err_code = -EBUSY;
+			else if (cqp_request->compl_info.min_err_code == 0x8029) {
+				if (!rf->reset) {
+					rf->reset = true;
+					rf->gen_ops.request_reset(rf);
+				}
 			}
 		}
 	}

drivers/infiniband/hw/irdma/verbs.c

@@ -3009,6 +3009,7 @@ static int irdma_dereg_mr(struct ib_mr *ib_mr, struct ib_udata *udata)
 	struct irdma_pble_alloc *palloc = &iwpbl->pble_alloc;
 	struct irdma_cqp_request *cqp_request;
 	struct cqp_cmds_info *cqp_info;
+	int status;
 
 	if (iwmr->type != IRDMA_MEMREG_TYPE_MEM) {
 		if (iwmr->region) {
@@ -3039,8 +3040,11 @@ static int irdma_dereg_mr(struct ib_mr *ib_mr, struct ib_udata *udata)
 	cqp_info->post_sq = 1;
 	cqp_info->in.u.dealloc_stag.dev = &iwdev->rf->sc_dev;
 	cqp_info->in.u.dealloc_stag.scratch = (uintptr_t)cqp_request;
-	irdma_handle_cqp_op(iwdev->rf, cqp_request);
+	status = irdma_handle_cqp_op(iwdev->rf, cqp_request);
 	irdma_put_cqp_request(&iwdev->rf->cqp, cqp_request);
+	if (status)
+		return status;
+
 	irdma_free_stag(iwdev, iwmr->stag);
 done:
 	if (iwpbl->pbl_allocated)