The error strings will be concatenated so add a separator to make the
combined error message easy to read.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 hw/scsi/scsi-generic.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/scsi/scsi-generic.c b/hw/scsi/scsi-generic.c
index a2316a5266..b55d068323 100644
--- a/hw/scsi/scsi-generic.c
+++ b/hw/scsi/scsi-generic.c
@@ -439,7 +439,7 @@ static bool scsi_generic_pr_register(SCSIDevice *s, uint64_t key, Error **errp)
     ret = scsi_SG_IO(s->conf.blk, SG_DXFER_TO_DEV, cmd, sizeof(cmd),
                      buf, sizeof(buf), s->io_timeout, errp);
     if (ret < 0) {
-        error_prepend(errp, "PERSISTENT RESERVE OUT with REGISTER");
+        error_prepend(errp, "PERSISTENT RESERVE OUT with REGISTER: ");
         return false;
     }
     return true;
@@ -463,7 +463,7 @@ static bool scsi_generic_pr_preempt(SCSIDevice *s, uint64_t key,
     ret = scsi_SG_IO(s->conf.blk, SG_DXFER_TO_DEV, cmd, sizeof(cmd),
                      buf, sizeof(buf), s->io_timeout, errp);
     if (ret < 0) {
-        error_prepend(errp, "PERSISTENT RESERVE OUT with PREEMPT");
+        error_prepend(errp, "PERSISTENT RESERVE OUT with PREEMPT: ");
         return false;
     }
     return true;
-- 
2.53.0