migration/rdma: Downgrade qemu_rdma_cleanup() errors to warnings

Functions that use an Error **errp parameter to return errors should
not also report them to the user, because reporting is the caller's
job.  When the caller does, the error is reported twice.  When it
doesn't (because it recovered from the error), there is no error to
report, i.e. the report is bogus.

qemu_rdma_source_init(), qemu_rdma_connect(),
rdma_start_incoming_migration(), and rdma_start_outgoing_migration()
violate this principle: they call error_report() via
qemu_rdma_cleanup().

Moreover, qemu_rdma_cleanup() can't fail.  It is called on error
paths, and QIOChannel close and finalization.  Are the conditions it
reports really errors?  I doubt it.

Downgrade qemu_rdma_cleanup()'s errors to warnings.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20230928132019.2544702-52-armbru@redhat.com>

diff --git a/migration/rdma.c b/migration/rdma.c
index 025523bf701f418eeca17d8047e4ff8223abd85f..9d5b3b76eb6c724429e4fadfed43ba4ee6a3f704 100644 (file)
--- a/migration/rdma.c
+++ b/migration/rdma.c
@@ -2375,9 +2375,9 @@ static void qemu_rdma_cleanup(RDMAContext *rdma)
                                        .type = RDMA_CONTROL_ERROR,
                                        .repeat = 1,
                                      };
-            error_report("Early error. Sending error.");
+            warn_report("Early error. Sending error.");
             if (qemu_rdma_post_send_control(rdma, NULL, &head, &err) < 0) {
-                error_report_err(err);
+                warn_report_err(err);
             }
         }