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vfio: don't ignore return value of migrate_add_blocker 

When an error occurs in migrate_add_blocker() it sets a
negative return value and uses error pointer we pass in.
Instead of just looking at the error pointer check for a negative return
value and avoid a coverity error because the return value is
set but never used. This fixes CID 1407219.

Reported-by: Coverity (CID 1407219)
Fixes: f045a0104c ("vfio: unplug failover primary device before migration")
Signed-off-by: Jens Freimann <jfreimann@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Jens Freimann 2019-11-18 10:41:48 -07:00 committed by Alex Williamson
parent 1335d64323
commit ed92369a57
1 changed files with 1 additions and 1 deletions
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2
hw/vfio/pci.c
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@ -2737,7 +2737,7 @@ static void vfio_realize(PCIDevice *pdev, Error **errp)
error_setg(&vdev->migration_blocker,
"VFIO device doesn't support migration");
ret = migrate_add_blocker(vdev->migration_blocker, &err);
if (err) {
if (ret) {
error_propagate(errp, err);
error_free(vdev->migration_blocker);
vdev->migration_blocker = NULL;