iwm: Fix -Wunused-but-set-variable warnings

MFC after:	1 week

diff --git a/sys/dev/iwm/if_iwm.c b/sys/dev/iwm/if_iwm.c
index 2ddf7caf8b20703dd1e3074f15f393bac856e485..439a68da9253a9482d7c5ef2626938679cc5f304 100644 (file)
--- a/sys/dev/iwm/if_iwm.c
+++ b/sys/dev/iwm/if_iwm.c
@@ -5620,7 +5620,7 @@ iwm_intr(void *arg)
 {
        struct iwm_softc *sc = arg;
        int handled = 0;
-       int r1, r2, rv = 0;
+       int r1, r2;
        int isperiodic = 0;
 
        IWM_LOCK(sc);
@@ -5712,7 +5712,6 @@ iwm_intr(void *arg)
                handled |= IWM_CSR_INT_BIT_HW_ERR;
                device_printf(sc->sc_dev, "hardware error, stopping device\n");
                iwm_stop(sc);
-               rv = 1;
                goto out;
        }
 
@@ -5757,8 +5756,6 @@ iwm_intr(void *arg)
        if (__predict_false(r1 & ~handled))
                IWM_DPRINTF(sc, IWM_DEBUG_INTR,
                    "%s: unhandled interrupts: %x\n", __func__, r1);
-       rv = 1;
-
  out_ena:
        iwm_restore_interrupts(sc);
  out:
@@ -5893,9 +5890,9 @@ iwm_pci_attach(device_t dev)
        }
        error = bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_NET | INTR_MPSAFE,
            NULL, iwm_intr, sc, &sc->sc_ih);
-       if (sc->sc_ih == NULL) {
+       if (error != 0) {
                device_printf(dev, "can't establish interrupt");
-                       return (ENXIO);
+               return (error);
        }
        sc->sc_dmat = bus_get_dma_tag(sc->sc_dev);