[Qemu-devel] [PATCH v2 1/3] migration: Call blk_resume_after_migration() for postcopy

[Kevin Wolf <kwolf@redhat.com>]

Commit d35ff5e6 ('block: Ignore guest dev permissions during incoming
migration') added blk_resume_after_migration() to the precopy migration
path, but neglected to add it to the duplicated code that is used for
postcopy migration. This means that the guest device doesn't request the
necessary permissions, which ultimately led to failing assertions.

Add the missing blk_resume_after_migration() to the postcopy path.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
---
 migration/savevm.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/migration/savevm.c b/migration/savevm.c
index 3b19a4a..43fa9bf 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -1623,6 +1623,14 @@ static void loadvm_postcopy_handle_run_bh(void *opaque)
         error_report_err(local_err);
     }
 
+    /* If we get an error here, just don't restart the VM yet. */
+    blk_resume_after_migration(&local_err);
+    if (local_err) {
+        error_free(local_err);
+        local_err = NULL;
+        autostart = false;
+    }
+
     trace_loadvm_postcopy_handle_run_cpu_sync();
     cpu_synchronize_all_post_init();
 
-- 
1.8.3.1