[PATCH v2 07/53] migration/rdma: Clean up two more harmless signed vs. unsigned issues

[Markus Armbruster <armbru@redhat.com>]

qemu_rdma_exchange_get_response() compares int parameter @expecting
with uint32_t head->type.  Actual arguments are non-negative
enumeration constants, RDMAControlHeader uint32_t member type, or
qemu_rdma_exchange_recv() int parameter expecting.  Actual arguments
for the latter are non-negative enumeration constants.  Change both
parameters to uint32_t.

In qio_channel_rdma_readv(), loop control variable @i is ssize_t, and
counts from 0 up to @niov, which is size_t.  Change @i to size_t.

While there, make qio_channel_rdma_readv() and
qio_channel_rdma_writev() more consistent: change the former's @done
to ssize_t, and delete the latter's useless initialization of @len.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
---
 migration/rdma.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/migration/rdma.c b/migration/rdma.c
index 5f423f66f0..faca0ed998 100644
--- a/migration/rdma.c
+++ b/migration/rdma.c
@@ -1801,7 +1801,7 @@ static int qemu_rdma_post_recv_control(RDMAContext *rdma, int idx)
  * Block and wait for a RECV control channel message to arrive.
  */
 static int qemu_rdma_exchange_get_response(RDMAContext *rdma,
-                RDMAControlHeader *head, int expecting, int idx)
+                RDMAControlHeader *head, uint32_t expecting, int idx)
 {
     uint32_t byte_len;
     int ret = qemu_rdma_block_for_wrid(rdma, RDMA_WRID_RECV_CONTROL + idx,
@@ -1959,7 +1959,7 @@ static int qemu_rdma_exchange_send(RDMAContext *rdma, RDMAControlHeader *head,
  * control-channel message.
  */
 static int qemu_rdma_exchange_recv(RDMAContext *rdma, RDMAControlHeader *head,
-                                int expecting)
+                                   uint32_t expecting)
 {
     RDMAControlHeader ready = {
                                 .len = 0,
@@ -2765,8 +2765,7 @@ static ssize_t qio_channel_rdma_writev(QIOChannel *ioc,
     RDMAContext *rdma;
     int ret;
     ssize_t done = 0;
-    size_t i;
-    size_t len = 0;
+    size_t i, len;
 
     RCU_READ_LOCK_GUARD();
     rdma = qatomic_rcu_read(&rioc->rdmaout);
@@ -2851,8 +2850,8 @@ static ssize_t qio_channel_rdma_readv(QIOChannel *ioc,
     RDMAContext *rdma;
     RDMAControlHeader head;
     int ret = 0;
-    ssize_t i;
-    size_t done = 0, len;
+    ssize_t done = 0;
+    size_t i, len;
 
     RCU_READ_LOCK_GUARD();
     rdma = qatomic_rcu_read(&rioc->rdmain);
-- 
2.41.0