qcacmn: Return failure if dst ring alloc fails for fastpath CE

Return failure in insmod if host fails to allocate
the ce receive buffers in the ce dst ring for fastpath rx
copy engine.

Change-Id: Ic2e0de5bb13a53efe1002a945841b674315dddef
CRs-Fixed: 2036365

hif/src/ce/ce_main.c

@@ -1874,8 +1874,10 @@ static int hif_post_recv_buffers_for_pipe(struct HIF_CE_pipe_info *pipe_info)
 
 /*
  * Try to post all desired receive buffers for all pipes.
- * returns 0 as oom_allocation_work will be scheduled
- * to recover any failures.
+ * Returns 0 for non fastpath rx copy engine as
+ * oom_allocation_work will be scheduled to recover any
+ * failures, non-zero if unable to completely replenish
+ * receive buffers for fastpath rx Copy engine.
  */
 static int hif_post_recv_buffers(struct hif_softc *scn)
 {
@@ -1894,9 +1896,15 @@ static int hif_post_recv_buffers(struct hif_softc *scn)
 		    ce_state && (ce_state->htt_rx_data))
 			continue;
 
-		hif_post_recv_buffers_for_pipe(pipe_info);
+		if (hif_post_recv_buffers_for_pipe(pipe_info) &&
+			ce_state->htt_rx_data &&
+			scn->fastpath_mode_on) {
+			rv = 1;
+			goto done;
+		}
 	}
 
+done:
 	A_TARGET_ACCESS_UNLIKELY(scn);
 
 	return rv;
@@ -1955,9 +1963,11 @@ static void hif_recv_buffer_cleanup_on_pipe(struct HIF_CE_pipe_info *pipe_info)
 	while (ce_revoke_recv_next
 		       (ce_hdl, &per_CE_context, (void **)&netbuf,
 			&CE_data) == QDF_STATUS_SUCCESS) {
-		qdf_nbuf_unmap_single(scn->qdf_dev, netbuf,
-				      QDF_DMA_FROM_DEVICE);
-		qdf_nbuf_free(netbuf);
+		if (netbuf) {
+			qdf_nbuf_unmap_single(scn->qdf_dev, netbuf,
+					      QDF_DMA_FROM_DEVICE);
+			qdf_nbuf_free(netbuf);
+		}
 	}
 }