ppc/kvm: change kvmppc_get_htab_fd() to return -errno on error

When kvmppc_get_htab_fd() fails, its return value is propagated up to
qemu_savevm_state_iterate() or to qemu_savevm_state_complete_precopy().
All savevm handlers expect to receive a negative errno on error.

Let's patch kvmppc_get_htab_fd() accordingly.

While here, let's change htab_load() in the spapr code to also
propagate the error, since it doesn't make sense to abort() if
we couldn't get the htab fd from KVM.

Signed-off-by: Greg Kurz <groug@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 3 insertions, 2 deletions

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 17ea776..ec0ea7b 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -1218,7 +1218,7 @@ static int get_htab_fd(sPAPRMachineState *spapr)
     spapr->htab_fd = kvmppc_get_htab_fd(false);
     if (spapr->htab_fd < 0) {
         error_report("Unable to open fd for reading hash table from KVM: %s",
-                     strerror(errno));
+                     strerror(spapr->htab_fd));
     }
 
     return spapr->htab_fd;
@@ -1958,7 +1958,8 @@ static int htab_load(QEMUFile *f, void *opaque, int version_id)
         fd = kvmppc_get_htab_fd(true);
         if (fd < 0) {
             error_report("Unable to open fd to restore KVM hash table: %s",
-                         strerror(errno));
+                         strerror(fd));
+            return fd;
         }
     }