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Just like done in d2bd05d88d ("xen-pciback: return proper values during BAR sizing") for the ROM BAR, ordinary ones also shouldn't compare the written value directly against ~0, but consider the r/o bits at the bottom (if any). Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>