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[PULL,v2,15/16] vhost-scsi: init backend features earlier

Message ID 1409751723-17480-16-git-send-email-mst@redhat.com
State New
Headers show

Commit Message

Michael S. Tsirkin Sept. 3, 2014, 1:45 p.m. UTC 
As vhost core can use backend_features during init, clear it earlier to
avoid using uninitialized memory.
This use would be harmless since vhost scsi ignores the result
anyway, but initializing earlier will help prevent valgrind errors,
and make scsi and net behave similarly.

Cc: qemu-stable@nongnu.org
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/scsi/vhost-scsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/hw/scsi/vhost-scsi.c b/hw/scsi/vhost-scsi.c
index ddfe76a..7146e0e 100644
--- a/hw/scsi/vhost-scsi.c
+++ b/hw/scsi/vhost-scsi.c
@@ -238,6 +238,7 @@  static void vhost_scsi_realize(DeviceState *dev, Error **errp)
     s->dev.nvqs = VHOST_SCSI_VQ_NUM_FIXED + vs->conf.num_queues;
     s->dev.vqs = g_new(struct vhost_virtqueue, s->dev.nvqs);
     s->dev.vq_index = 0;
+    s->dev.backend_features = 0;
 
     ret = vhost_dev_init(&s->dev, (void *)(uintptr_t)vhostfd,
                          VHOST_BACKEND_TYPE_KERNEL, true);
@@ -246,7 +247,6 @@  static void vhost_scsi_realize(DeviceState *dev, Error **errp)
                    strerror(-ret));
         return;
     }
-    s->dev.backend_features = 0;
 
     error_setg(&s->migration_blocker,
             "vhost-scsi does not support migration");