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smi_data_buf_free() references dcdbas_pdev when calling dma_free_coherent(). In dcdbas_exit(), smi_data_buf_free() is called after platform_device_unregister(dcdbas_pdev). This patch moves platform_device_unregister(dcdbas_pdev) after smi_data_buf_free() in dcdbas_exit(). Signed-off-by: Doug Warzecha <Douglas_Warzecha@dell.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>