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None of pci_dma_read()'s callers check the return value except rocker. There is no need to check it because it always return 0. So the check work is useless. Remove it entirely. Suggested-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com> Signed-off-by: Jason Wang <jasowang@redhat.com>