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hw/9pfs: Fix crash when mounting with synthfs 

Some Fsdriver backend don't have fs_root. So check for that in
migrate message.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
This commit is contained in:
Aneesh Kumar K.V 2012-01-19 12:21:12 +05:30
parent 2d40564aaa
commit 71f86cd6f3
1 changed files with 1 additions and 1 deletions
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2
hw/9pfs/virtio-9p.c
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@ -986,7 +986,7 @@ static void v9fs_attach(void *opaque)
s->root_fid = fid;
/* disable migration */
error_set(&s->migration_blocker, QERR_VIRTFS_FEATURE_BLOCKS_MIGRATION,
s->ctx.fs_root, s->tag);
s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag);
migrate_add_blocker(s->migration_blocker);
out:
put_fid(pdu, fidp);