migration: fix live migration failure with compression
Because of commit 11808bb0, which remove some condition checks of 'f->ops->writev_buffer', 'qemu_put_qemu_file' should be enhanced to clear the 'f_src->iovcnt', or 'f_src->iovcnt' may exceed the MAX_IOV_SIZE which will break live migration. This should be fixed. Signed-off-by: NLiang Li <liang.z.li@intel.com> Reported-by: NJinshi Zhang <jinshi.c.zhang@intel.com> Reviewed-by: NDr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <1470702146-24399-1-git-send-email-liang.z.li@intel.com> Signed-off-by: NAmit Shah <amit.shah@redhat.com>
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