rt2x00_set_field32(®, ARCSR2_SERVICE, 0x04);
rt2x00_set_field32(®, ARCSR2_LENGTH, get_duration(ACK_SIZE, 10));
rt2x00pci_register_write(rt2x00dev, ARCSR2, reg);
rt2x00_set_field32(®, ARCSR2_SERVICE, 0x04);
rt2x00_set_field32(®, ARCSR2_LENGTH, get_duration(ACK_SIZE, 10));
rt2x00pci_register_write(rt2x00dev, ARCSR2, reg);