[PATCH v2 26/53] migration/rdma: Dumb down remaining int error values to -1

[Markus Armbruster <armbru@redhat.com>]

This is just to make the error value more obvious.  Callers don't
mind.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Li Zhijian <lizhijian@fujitsu.com>
---
 migration/rdma.c | 45 +++++++++++++++++++++++----------------------
 1 file changed, 23 insertions(+), 22 deletions(-)

diff --git a/migration/rdma.c b/migration/rdma.c
index 4817f1ea10..fe101236c4 100644
--- a/migration/rdma.c
+++ b/migration/rdma.c
@@ -1434,7 +1434,7 @@ static int qemu_rdma_unregister_waiting(RDMAContext *rdma)
         ret = qemu_rdma_exchange_send(rdma, &head, (uint8_t *) &reg,
                                 &resp, NULL, NULL);
         if (ret < 0) {
-            return ret;
+            return -1;
         }
 
         trace_qemu_rdma_unregister_waiting_complete(chunk);
@@ -1475,7 +1475,7 @@ static int qemu_rdma_poll(RDMAContext *rdma, struct ibv_cq *cq,
 
     if (ret < 0) {
         error_report("ibv_poll_cq failed");
-        return ret;
+        return -1;
     }
 
     wr_id = wc.wr_id & RDMA_WRID_TYPE_MASK;
@@ -1604,7 +1604,7 @@ static int qemu_rdma_wait_comp_channel(RDMAContext *rdma,
     if (rdma->received_error) {
         return -1;
     }
-    return rdma->error_state;
+    return -!!rdma->error_state;
 }
 
 static struct ibv_comp_channel *to_channel(RDMAContext *rdma, uint64_t wrid)
@@ -1649,7 +1649,7 @@ static int qemu_rdma_block_for_wrid(RDMAContext *rdma,
     while (wr_id != wrid_requested) {
         ret = qemu_rdma_poll(rdma, poll_cq, &wr_id_in, byte_len);
         if (ret < 0) {
-            return ret;
+            return -1;
         }
 
         wr_id = wr_id_in & RDMA_WRID_TYPE_MASK;
@@ -1723,7 +1723,7 @@ err_block_for_wrid:
     }
 
     rdma->error_state = ret;
-    return ret;
+    return -1;
 }
 
 /*
@@ -1778,9 +1778,10 @@ static int qemu_rdma_post_send_control(RDMAContext *rdma, uint8_t *buf,
     ret = qemu_rdma_block_for_wrid(rdma, RDMA_WRID_SEND_CONTROL, NULL);
     if (ret < 0) {
         error_report("rdma migration: send polling control error");
+        return -1;
     }
 
-    return ret;
+    return 0;
 }
 
 /*
@@ -1822,7 +1823,7 @@ static int qemu_rdma_exchange_get_response(RDMAContext *rdma,
 
     if (ret < 0) {
         error_report("rdma migration: recv polling control error!");
-        return ret;
+        return -1;
     }
 
     network_to_control((void *) rdma->wr_data[idx].control);
@@ -1900,7 +1901,7 @@ static int qemu_rdma_exchange_send(RDMAContext *rdma, RDMAControlHeader *head,
         ret = qemu_rdma_exchange_get_response(rdma,
                                     &resp, RDMA_CONTROL_READY, RDMA_WRID_READY);
         if (ret < 0) {
-            return ret;
+            return -1;
         }
     }
 
@@ -1912,7 +1913,7 @@ static int qemu_rdma_exchange_send(RDMAContext *rdma, RDMAControlHeader *head,
         if (ret) {
             error_report("rdma migration: error posting"
                     " extra control recv for anticipated result!");
-            return ret;
+            return -1;
         }
     }
 
@@ -1922,7 +1923,7 @@ static int qemu_rdma_exchange_send(RDMAContext *rdma, RDMAControlHeader *head,
     ret = qemu_rdma_post_recv_control(rdma, RDMA_WRID_READY);
     if (ret) {
         error_report("rdma migration: error posting first control recv!");
-        return ret;
+        return -1;
     }
 
     /*
@@ -1932,7 +1933,7 @@ static int qemu_rdma_exchange_send(RDMAContext *rdma, RDMAControlHeader *head,
 
     if (ret < 0) {
         error_report("Failed to send control buffer!");
-        return ret;
+        return -1;
     }
 
     /*
@@ -1943,7 +1944,7 @@ static int qemu_rdma_exchange_send(RDMAContext *rdma, RDMAControlHeader *head,
             trace_qemu_rdma_exchange_send_issue_callback();
             ret = callback(rdma);
             if (ret < 0) {
-                return ret;
+                return -1;
             }
         }
 
@@ -1952,7 +1953,7 @@ static int qemu_rdma_exchange_send(RDMAContext *rdma, RDMAControlHeader *head,
                                               resp->type, RDMA_WRID_DATA);
 
         if (ret < 0) {
-            return ret;
+            return -1;
         }
 
         qemu_rdma_move_header(rdma, RDMA_WRID_DATA, resp);
@@ -1988,7 +1989,7 @@ static int qemu_rdma_exchange_recv(RDMAContext *rdma, RDMAControlHeader *head,
 
     if (ret < 0) {
         error_report("Failed to send control buffer!");
-        return ret;
+        return -1;
     }
 
     /*
@@ -1998,7 +1999,7 @@ static int qemu_rdma_exchange_recv(RDMAContext *rdma, RDMAControlHeader *head,
                                           expecting, RDMA_WRID_READY);
 
     if (ret < 0) {
-        return ret;
+        return -1;
     }
 
     qemu_rdma_move_header(rdma, RDMA_WRID_READY, head);
@@ -2009,7 +2010,7 @@ static int qemu_rdma_exchange_recv(RDMAContext *rdma, RDMAControlHeader *head,
     ret = qemu_rdma_post_recv_control(rdma, RDMA_WRID_READY);
     if (ret) {
         error_report("rdma migration: error posting second control recv!");
-        return ret;
+        return -1;
     }
 
     return 0;
@@ -2082,7 +2083,7 @@ retry:
                     "block %d chunk %" PRIu64
                     " current %" PRIu64 " len %" PRIu64 " %d",
                     current_index, chunk, sge.addr, length, rdma->nb_sent);
-            return ret;
+            return -1;
         }
     }
 
@@ -2140,7 +2141,7 @@ retry:
             ret = qemu_rdma_exchange_send(rdma, &head, (uint8_t *) &reg,
                                     &resp, &reg_result_idx, NULL);
             if (ret < 0) {
-                return ret;
+                return -1;
             }
 
             /* try to overlap this single registration with the one we sent. */
@@ -2214,7 +2215,7 @@ retry:
         if (ret < 0) {
             error_report("rdma migration: failed to make "
                          "room in full send queue!");
-            return ret;
+            return -1;
         }
 
         goto retry;
@@ -2256,7 +2257,7 @@ static int qemu_rdma_write_flush(QEMUFile *f, RDMAContext *rdma)
             rdma->current_index, rdma->current_addr, rdma->current_length);
 
     if (ret < 0) {
-        return ret;
+        return -1;
     }
 
     if (ret == 0) {
@@ -2338,7 +2339,7 @@ static int qemu_rdma_write(QEMUFile *f, RDMAContext *rdma,
     if (!qemu_rdma_buffer_mergeable(rdma, current_addr, len)) {
         ret = qemu_rdma_write_flush(f, rdma);
         if (ret) {
-            return ret;
+            return -1;
         }
         rdma->current_length = 0;
         rdma->current_addr = current_addr;
@@ -3516,7 +3517,7 @@ err_rdma_dest_wait:
     rdma->error_state = ret;
     qemu_rdma_cleanup(rdma);
     g_free(rdma_return_path);
-    return ret;
+    return -1;
 }
 
 static int dest_ram_sort_func(const void *a, const void *b)
-- 
2.41.0