Commit 9c84b797 authored by Sujith's avatar Sujith Committed by John W. Linville
Browse files

ath9k: Streamline attach/detach 



Simplify attach and detach routines by consolidating
the stop and suspend functions.

Signed-off-by: default avatarSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 50fdae2c

drivers/net/wireless/ath9k/core.c

+78 −140
Original line number Diff line number Diff line
@@ -186,17 +186,10 @@ static int ath_setup_channels(struct ath_softc *sc) 
	struct ath9k_channel *c;



	/* Fill in ah->ah_channels */

	if (!ath9k_regd_init_channels(ah,

				      ATH_CHAN_MAX,

				      (u32 *)&nchan,

				      regclassids,

				      ATH_REGCLASSIDS_MAX,

				      &nregclass,

				      CTRY_DEFAULT,

				      false,

				      1)) {

	if (!ath9k_regd_init_channels(ah, ATH_CHAN_MAX, (u32 *)&nchan,

				      regclassids, ATH_REGCLASSIDS_MAX,

				      &nregclass, CTRY_DEFAULT, false, 1)) {

		u32 rd = ah->ah_currentRD;



		DPRINTF(sc, ATH_DBG_FATAL,

			"%s: unable to collect channel list; "

			"regdomain likely %u country code %u\n",
@@ -217,40 +210,32 @@ static int ath_setup_channels(struct ath_softc *sc) 
			chan_2ghz[a].max_power = c->maxTxPower;



			if (c->privFlags & CHANNEL_DISALLOW_ADHOC)

				chan_2ghz[a].flags |=

					IEEE80211_CHAN_NO_IBSS;

				chan_2ghz[a].flags |= IEEE80211_CHAN_NO_IBSS;

			if (c->channelFlags & CHANNEL_PASSIVE)

				chan_2ghz[a].flags |=

					IEEE80211_CHAN_PASSIVE_SCAN;

				chan_2ghz[a].flags |= IEEE80211_CHAN_PASSIVE_SCAN;



			band_2ghz->n_channels = ++a;



			DPRINTF(sc, ATH_DBG_CONFIG,

				"%s: 2MHz channel: %d, "

				"channelFlags: 0x%x\n",

				__func__,

				c->channel,

				c->channelFlags);

				__func__, c->channel, c->channelFlags);

		} else if (IS_CHAN_5GHZ(c)) {

			chan_5ghz[b].band = IEEE80211_BAND_5GHZ;

			chan_5ghz[b].center_freq = c->channel;

			chan_5ghz[b].max_power = c->maxTxPower;



			if (c->privFlags & CHANNEL_DISALLOW_ADHOC)

				chan_5ghz[b].flags |=

					IEEE80211_CHAN_NO_IBSS;

				chan_5ghz[b].flags |= IEEE80211_CHAN_NO_IBSS;

			if (c->channelFlags & CHANNEL_PASSIVE)

				chan_5ghz[b].flags |=

					IEEE80211_CHAN_PASSIVE_SCAN;

				chan_5ghz[b].flags |= IEEE80211_CHAN_PASSIVE_SCAN;



			band_5ghz->n_channels = ++b;



			DPRINTF(sc, ATH_DBG_CONFIG,

				"%s: 5MHz channel: %d, "

				"channelFlags: 0x%x\n",

				__func__,

				c->channel,

				c->channelFlags);

				__func__, c->channel, c->channelFlags);

		}

	}
@@ -291,44 +276,6 @@ static enum wireless_mode ath_chan2mode(struct ath9k_channel *chan) 
	return ATH9K_MODE_11B;

}



/*

 * Stop the device, grabbing the top-level lock to protect

 * against concurrent entry through ath_init (which can happen

 * if another thread does a system call and the thread doing the

 * stop is preempted).

 */



static int ath_stop(struct ath_softc *sc)

{

	struct ath_hal *ah = sc->sc_ah;



	DPRINTF(sc, ATH_DBG_CONFIG, "%s: invalid %ld\n",

		__func__, sc->sc_flags & SC_OP_INVALID);



	/*

	 * Shutdown the hardware and driver:

	 *    stop output from above

	 *    turn off timers

	 *    disable interrupts

	 *    clear transmit machinery

	 *    clear receive machinery

	 *    turn off the radio

	 *    reclaim beacon resources

	 *

	 * Note that some of this work is not possible if the

	 * hardware is gone (invalid).

	 */



	ath_draintxq(sc, false);

	if (!(sc->sc_flags & SC_OP_INVALID)) {

		ath_stoprecv(sc);

		ath9k_hw_phy_disable(ah);

	} else

		sc->sc_rxlink = NULL;



	return 0;

}



/*

 * Set the current channel

 *
@@ -650,16 +597,6 @@ int ath_open(struct ath_softc *sc, struct ath9k_channel *initial_chan) 
	DPRINTF(sc, ATH_DBG_CONFIG, "%s: mode %d\n",

		__func__, sc->sc_ah->ah_opmode);



	/*

	 * Stop anything previously setup.  This is safe

	 * whether this is the first time through or not.

	 */

	ath_stop(sc);



	/* Initialize chanmask selection */

	sc->sc_tx_chainmask = ah->ah_caps.tx_chainmask;

	sc->sc_rx_chainmask = ah->ah_caps.rx_chainmask;



	/* Reset SERDES registers */

	ath9k_hw_configpcipowersave(ah, 0);
@@ -685,6 +622,7 @@ int ath_open(struct ath_softc *sc, struct ath9k_channel *initial_chan) 
		goto done;

	}

	spin_unlock_bh(&sc->sc_resetlock);



	/*

	 * This is needed only to setup initial state

	 * but it's best done after a reset.
@@ -704,6 +642,7 @@ int ath_open(struct ath_softc *sc, struct ath9k_channel *initial_chan) 
		error = -EIO;

		goto done;

	}



	/* Setup our intr mask. */

	sc->sc_imask = ATH9K_INT_RX | ATH9K_INT_TX

		| ATH9K_INT_RXEOL | ATH9K_INT_RXORN
@@ -733,30 +672,61 @@ int ath_open(struct ath_softc *sc, struct ath9k_channel *initial_chan) 
	    (sc->sc_ah->ah_opmode == ATH9K_M_STA) &&

	    !sc->sc_config.swBeaconProcess)

		sc->sc_imask |= ATH9K_INT_TIM;



	ath_setcurmode(sc, ath_chan2mode(initial_chan));



	/*

	 *  Don't enable interrupts here as we've not yet built our

	 *  vap and node data structures, which will be needed as soon

	 *  as we start receiving.

	 */

	ath_setcurmode(sc, ath_chan2mode(initial_chan));



	/* XXX: we must make sure h/w is ready and clear invalid flag

	 * before turning on interrupt. */

	sc->sc_flags &= ~SC_OP_INVALID;



	ieee80211_wake_queues(sc->hw);

done:

	return error;

}



void ath_stop(struct ath_softc *sc)

{

	struct ath_hal *ah = sc->sc_ah;



	DPRINTF(sc, ATH_DBG_CONFIG, "%s: Cleaning up\n", __func__);



	ieee80211_stop_queues(sc->hw);



	/* make sure h/w will not generate any interrupt

	 * before setting the invalid flag. */

	ath9k_hw_set_interrupts(ah, 0);



	if (!(sc->sc_flags & SC_OP_INVALID)) {

		ath_draintxq(sc, false);

		ath_stoprecv(sc);

		ath9k_hw_phy_disable(ah);

	} else

		sc->sc_rxlink = NULL;



#ifdef CONFIG_RFKILL

	if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)

		cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);

#endif

	/* disable HAL and put h/w to sleep */

	ath9k_hw_disable(sc->sc_ah);

	ath9k_hw_configpcipowersave(sc->sc_ah, 1);



	sc->sc_flags |= SC_OP_INVALID;

}



int ath_reset(struct ath_softc *sc, bool retry_tx)

{

	struct ath_hal *ah = sc->sc_ah;

	int status;

	int error = 0;



	ath9k_hw_set_interrupts(ah, 0);	/* disable interrupts */

	ath_draintxq(sc, retry_tx);	/* stop xmit */

	ath_stoprecv(sc);		/* stop recv */

	ath_flushrecv(sc);		/* flush recv queue */

	ath9k_hw_set_interrupts(ah, 0);

	ath_draintxq(sc, retry_tx);

	ath_stoprecv(sc);

	ath_flushrecv(sc);



	/* Reset chip */

	spin_lock_bh(&sc->sc_resetlock);
@@ -771,7 +741,7 @@ int ath_reset(struct ath_softc *sc, bool retry_tx) 
	}

	spin_unlock_bh(&sc->sc_resetlock);



	if (ath_startrecv(sc) != 0)	/* restart recv */

	if (ath_startrecv(sc) != 0)

		DPRINTF(sc, ATH_DBG_FATAL,

			"%s: unable to start recv logic\n", __func__);
@@ -804,29 +774,6 @@ int ath_reset(struct ath_softc *sc, bool retry_tx) 
	return error;

}



int ath_suspend(struct ath_softc *sc)

{

	struct ath_hal *ah = sc->sc_ah;



	/* No I/O if device has been surprise removed */

	if (sc->sc_flags & SC_OP_INVALID)

		return -EIO;



	/* Shut off the interrupt before setting sc->sc_invalid to '1' */

	ath9k_hw_set_interrupts(ah, 0);



	/* XXX: we must make sure h/w will not generate any interrupt

	 * before setting the invalid flag. */

	sc->sc_flags |= SC_OP_INVALID;



	/* disable HAL and put h/w to sleep */

	ath9k_hw_disable(sc->sc_ah);



	ath9k_hw_configpcipowersave(sc->sc_ah, 1);



	return 0;

}



/* Interrupt handler.  Most of the actual processing is deferred.

 * It's the caller's responsibility to ensure the chip is awake. */
@@ -994,11 +941,9 @@ int ath_init(u16 devid, struct ath_softc *sc) 


	/* XXX: hardware will not be ready until ath_open() being called */

	sc->sc_flags |= SC_OP_INVALID;



	sc->sc_debug = DBG_DEFAULT;

	DPRINTF(sc, ATH_DBG_CONFIG, "%s: devid 0x%x\n", __func__, devid);



	/* Initialize tasklet */

	spin_lock_init(&sc->sc_resetlock);

	tasklet_init(&sc->intr_tq, ath9k_tasklet, (unsigned long)sc);

	tasklet_init(&sc->bcon_tasklet, ath9k_beacon_tasklet,

		     (unsigned long)sc);
@@ -1011,8 +956,6 @@ int ath_init(u16 devid, struct ath_softc *sc) 
	/* XXX assert csz is non-zero */

	sc->sc_cachelsz = csz << 2;	/* convert to bytes */



	spin_lock_init(&sc->sc_resetlock);



	ah = ath9k_hw_attach(devid, sc, sc->mem, &status);

	if (ah == NULL) {

		DPRINTF(sc, ATH_DBG_FATAL,
@@ -1023,10 +966,6 @@ int ath_init(u16 devid, struct ath_softc *sc) 
	}

	sc->sc_ah = ah;



	/* Initializes the noise floor to a reasonable default value.

	 * Later on this will be updated during ANI processing. */

	sc->sc_ani.sc_noise_floor = ATH_DEFAULT_NOISE_FLOOR;



	/* Get the hardware key cache size. */

	sc->sc_keymax = ah->ah_caps.keycache_size;

	if (sc->sc_keymax > ATH_KEYMAX) {
@@ -1054,17 +993,14 @@ int ath_init(u16 devid, struct ath_softc *sc) 
		set_bit(i + 64, sc->sc_keymap);

		set_bit(i + 32 + 64, sc->sc_keymap);

	}

	/*

	 * Collect the channel list using the default country

	 * code and including outdoor channels.  The 802.11 layer

	 * is resposible for filtering this list based on settings

	 * like the phy mode.

	 */



	/* Collect the channel list using the default country code */



	error = ath_setup_channels(sc);

	if (error)

		goto bad;



	/* default to STA mode */

	/* default to MONITOR mode */

	sc->sc_ah->ah_opmode = ATH9K_M_MONITOR;



	/* Setup rate tables */
@@ -1134,6 +1070,10 @@ int ath_init(u16 devid, struct ath_softc *sc) 
		goto bad2;

	}



	/* Initializes the noise floor to a reasonable default value.

	 * Later on this will be updated during ANI processing. */



	sc->sc_ani.sc_noise_floor = ATH_DEFAULT_NOISE_FLOOR;

	setup_timer(&sc->sc_ani.timer, ath_ani_calibrate, (unsigned long)sc);



	sc->sc_rc = ath_rate_attach(ah);
@@ -1194,6 +1134,7 @@ int ath_init(u16 devid, struct ath_softc *sc) 
		ATH_SET_VAP_BSSID_MASK(sc->sc_bssidmask);

		ath9k_hw_setbssidmask(ah, sc->sc_bssidmask);

	}



	sc->sc_slottime = ATH9K_SLOT_TIME_9;	/* default to short slot time */



	/* initialize beacon slots */
@@ -1208,6 +1149,22 @@ int ath_init(u16 devid, struct ath_softc *sc) 
	ath_slow_ant_div_init(&sc->sc_antdiv, sc, 0x127);

#endif



	/* setup channels and rates */



	sc->sbands[IEEE80211_BAND_2GHZ].channels =

		sc->channels[IEEE80211_BAND_2GHZ];

	sc->sbands[IEEE80211_BAND_2GHZ].bitrates =

		sc->rates[IEEE80211_BAND_2GHZ];

	sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ;



	if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes)) {

		sc->sbands[IEEE80211_BAND_5GHZ].channels =

			sc->channels[IEEE80211_BAND_5GHZ];

		sc->sbands[IEEE80211_BAND_5GHZ].bitrates =

			sc->rates[IEEE80211_BAND_5GHZ];

		sc->sbands[IEEE80211_BAND_5GHZ].band = IEEE80211_BAND_5GHZ;

	}



	return 0;

bad2:

	/* cleanup tx queues */
@@ -1217,27 +1174,8 @@ int ath_init(u16 devid, struct ath_softc *sc) 
bad:

	if (ah)

		ath9k_hw_detach(ah);

	return error;

}



void ath_deinit(struct ath_softc *sc)

{

	struct ath_hal *ah = sc->sc_ah;

	int i;



	DPRINTF(sc, ATH_DBG_CONFIG, "%s\n", __func__);



	tasklet_kill(&sc->intr_tq);

	tasklet_kill(&sc->bcon_tasklet);

	ath_stop(sc);

	if (!(sc->sc_flags & SC_OP_INVALID))

		ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);

	ath_rate_detach(sc->sc_rc);

	/* cleanup tx queues */

	for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)

		if (ATH_TXQ_SETUP(sc, i))

			ath_tx_cleanupq(sc, &sc->sc_txq[i]);

	ath9k_hw_detach(ah);

	return error;

}



/*******************/

drivers/net/wireless/ath9k/core.h

+1 −2
Original line number Diff line number Diff line
@@ -997,9 +997,8 @@ struct ath_softc { 
};



int ath_init(u16 devid, struct ath_softc *sc);

void ath_deinit(struct ath_softc *sc);

int ath_open(struct ath_softc *sc, struct ath9k_channel *initial_chan);

int ath_suspend(struct ath_softc *sc);

void ath_stop(struct ath_softc *sc);

irqreturn_t ath_isr(int irq, void *dev);

int ath_reset(struct ath_softc *sc, bool retry_tx);

int ath_set_channel(struct ath_softc *sc, struct ath9k_channel *hchan);

drivers/net/wireless/ath9k/main.c

+79 −106
Original line number Diff line number Diff line
@@ -616,6 +616,7 @@ static void ath_init_leds(struct ath_softc *sc) 
}



#ifdef CONFIG_RFKILL



/*******************/

/*	Rfkill	   */

/*******************/
@@ -816,43 +817,72 @@ static void ath_deinit_rfkill(struct ath_softc *sc) 
		sc->rf_kill.rfkill = NULL;

	}

}



static int ath_start_rfkill_poll(struct ath_softc *sc)

{

	if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)

		queue_delayed_work(sc->hw->workqueue,

				   &sc->rf_kill.rfkill_poll, 0);



	if (!(sc->sc_flags & SC_OP_RFKILL_REGISTERED)) {

		if (rfkill_register(sc->rf_kill.rfkill)) {

			DPRINTF(sc, ATH_DBG_FATAL,

				"Unable to register rfkill\n");

			rfkill_free(sc->rf_kill.rfkill);



			/* Deinitialize the device */

			if (sc->pdev->irq)

				free_irq(sc->pdev->irq, sc);

			ath_detach(sc);

			pci_iounmap(sc->pdev, sc->mem);

			pci_release_region(sc->pdev, 0);

			pci_disable_device(sc->pdev);

			ieee80211_free_hw(hw);

			return -EIO;

		} else {

			sc->sc_flags |= SC_OP_RFKILL_REGISTERED;

		}

	}



	return 0;

}

#endif /* CONFIG_RFKILL */



static int ath_detach(struct ath_softc *sc)

static void ath_detach(struct ath_softc *sc)

{

	struct ieee80211_hw *hw = sc->hw;

	int i = 0;



	DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach ATH hw\n", __func__);



	/* Deinit LED control */

	ieee80211_unregister_hw(hw);



	ath_deinit_leds(sc);



#ifdef CONFIG_RFKILL

	/* deinit rfkill */

	ath_deinit_rfkill(sc);

#endif



	/* Unregister hw */



	ieee80211_unregister_hw(hw);



	/* unregister Rate control */

	ath_rate_control_unregister();



	/* tx/rx cleanup */

	ath_rate_detach(sc->sc_rc);



	ath_rx_cleanup(sc);

	ath_tx_cleanup(sc);



	/* Deinit */

	tasklet_kill(&sc->intr_tq);

	tasklet_kill(&sc->bcon_tasklet);



	ath_deinit(sc);

	if (!(sc->sc_flags & SC_OP_INVALID))

		ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);



	return 0;

	/* cleanup tx queues */

	for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)

		if (ATH_TXQ_SETUP(sc, i))

			ath_tx_cleanupq(sc, &sc->sc_txq[i]);



	ath9k_hw_detach(sc->sc_ah);

}



static int ath_attach(u16 devid,

		      struct ath_softc *sc)

static int ath_attach(u16 devid, struct ath_softc *sc)

{

	struct ieee80211_hw *hw = sc->hw;

	int error = 0;
@@ -867,36 +897,15 @@ static int ath_attach(u16 devid, 


	SET_IEEE80211_PERM_ADDR(hw, sc->sc_myaddr);



	/* setup channels and rates */



	sc->sbands[IEEE80211_BAND_2GHZ].channels =

		sc->channels[IEEE80211_BAND_2GHZ];

	sc->sbands[IEEE80211_BAND_2GHZ].bitrates =

		sc->rates[IEEE80211_BAND_2GHZ];

	sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ;



	if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)

		/* Setup HT capabilities for 2.4Ghz*/

		setup_ht_cap(&sc->sbands[IEEE80211_BAND_2GHZ].ht_cap);



	hw->wiphy->bands[IEEE80211_BAND_2GHZ] =

		&sc->sbands[IEEE80211_BAND_2GHZ];



	if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes)) {

		sc->sbands[IEEE80211_BAND_5GHZ].channels =

			sc->channels[IEEE80211_BAND_5GHZ];

		sc->sbands[IEEE80211_BAND_5GHZ].bitrates =

			sc->rates[IEEE80211_BAND_5GHZ];

		sc->sbands[IEEE80211_BAND_5GHZ].band =

			IEEE80211_BAND_5GHZ;



		if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)

			/* Setup HT capabilities for 5Ghz*/

			setup_ht_cap(&sc->sbands[IEEE80211_BAND_5GHZ].ht_cap);

	hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |

		IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |

		IEEE80211_HW_SIGNAL_DBM |

		IEEE80211_HW_AMPDU_AGGREGATION;



		hw->wiphy->bands[IEEE80211_BAND_5GHZ] =

			&sc->sbands[IEEE80211_BAND_5GHZ];

	}

	hw->wiphy->interface_modes =

		BIT(NL80211_IFTYPE_AP) |

		BIT(NL80211_IFTYPE_STATION) |

		BIT(NL80211_IFTYPE_ADHOC);



	hw->queues = 4;

	hw->sta_data_size = sizeof(struct ath_node);
@@ -913,6 +922,17 @@ static int ath_attach(u16 devid, 
		goto bad;

	}



	if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT) {

		setup_ht_cap(&sc->sbands[IEEE80211_BAND_2GHZ].ht_cap);

		if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes))

			setup_ht_cap(&sc->sbands[IEEE80211_BAND_5GHZ].ht_cap);

	}



	hw->wiphy->bands[IEEE80211_BAND_2GHZ] =	&sc->sbands[IEEE80211_BAND_2GHZ];

	if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes))

		hw->wiphy->bands[IEEE80211_BAND_5GHZ] =

			&sc->sbands[IEEE80211_BAND_5GHZ];



	error = ieee80211_register_hw(hw);

	if (error != 0) {

		ath_rate_control_unregister();
@@ -963,49 +983,26 @@ static int ath9k_start(struct ieee80211_hw *hw) 
	pos = ath_get_channel(sc, curchan);

	if (pos == -1) {

		DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__);

		return -EINVAL;

		error = -EINVAL;

		goto exit;

	}



	sc->sc_ah->ah_channels[pos].chanmode =

		(curchan->band == IEEE80211_BAND_2GHZ) ? CHANNEL_G : CHANNEL_A;



	/* open ath_dev */

	error = ath_open(sc, &sc->sc_ah->ah_channels[pos]);

	if (error) {

		DPRINTF(sc, ATH_DBG_FATAL,

			"%s: Unable to complete ath_open\n", __func__);

		return error;

		goto exit;

	}



#ifdef CONFIG_RFKILL

	/* Start rfkill polling */

	if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)

		queue_delayed_work(sc->hw->workqueue,

				   &sc->rf_kill.rfkill_poll, 0);



	if (!(sc->sc_flags & SC_OP_RFKILL_REGISTERED)) {

		if (rfkill_register(sc->rf_kill.rfkill)) {

			DPRINTF(sc, ATH_DBG_FATAL,

					"Unable to register rfkill\n");

			rfkill_free(sc->rf_kill.rfkill);



			/* Deinitialize the device */

			if (sc->pdev->irq)

				free_irq(sc->pdev->irq, sc);

			ath_detach(sc);

			pci_iounmap(sc->pdev, sc->mem);

			pci_release_region(sc->pdev, 0);

			pci_disable_device(sc->pdev);

			ieee80211_free_hw(hw);

			return -EIO;

		} else {

			sc->sc_flags |= SC_OP_RFKILL_REGISTERED;

		}

	}

	error = ath_start_rfkill_poll(sc);

#endif



	ieee80211_wake_queues(hw);

	return 0;

exit:

	return error;

}



static int ath9k_tx(struct ieee80211_hw *hw,
@@ -1065,21 +1062,15 @@ static int ath9k_tx(struct ieee80211_hw *hw, 
static void ath9k_stop(struct ieee80211_hw *hw)

{

	struct ath_softc *sc = hw->priv;

	int error;



	DPRINTF(sc, ATH_DBG_CONFIG, "%s: Driver halt\n", __func__);



	error = ath_suspend(sc);

	if (error)

		DPRINTF(sc, ATH_DBG_CONFIG,

			"%s: Device is no longer present\n", __func__);

	if (sc->sc_flags & SC_OP_INVALID) {

		DPRINTF(sc, ATH_DBG_ANY, "%s: Device not present\n", __func__);

		return;

	}



	ieee80211_stop_queues(hw);

	ath_stop(sc);



#ifdef CONFIG_RFKILL

	if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)

		cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);

#endif

	DPRINTF(sc, ATH_DBG_CONFIG, "%s: Driver halt\n", __func__);

}



static int ath9k_add_interface(struct ieee80211_hw *hw,
@@ -1643,17 +1634,6 @@ static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) 
		goto bad2;

	}



	hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |

		IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |

		IEEE80211_HW_SIGNAL_DBM |

		IEEE80211_HW_NOISE_DBM |

		IEEE80211_HW_AMPDU_AGGREGATION;



	hw->wiphy->interface_modes =

		BIT(NL80211_IFTYPE_AP) |

		BIT(NL80211_IFTYPE_STATION) |

		BIT(NL80211_IFTYPE_ADHOC);



	SET_IEEE80211_DEV(hw, &pdev->dev);

	pci_set_drvdata(pdev, hw);
@@ -1701,17 +1681,10 @@ static void ath_pci_remove(struct pci_dev *pdev) 
{

	struct ieee80211_hw *hw = pci_get_drvdata(pdev);

	struct ath_softc *sc = hw->priv;

	enum ath9k_int status;



	if (pdev->irq) {

		ath9k_hw_set_interrupts(sc->sc_ah, 0);

		/* clear the ISR */

		ath9k_hw_getisr(sc->sc_ah, &status);

		sc->sc_flags |= SC_OP_INVALID;

		free_irq(pdev->irq, sc);

	}

	ath_detach(sc);



	if (pdev->irq)

		free_irq(pdev->irq, sc);

	pci_iounmap(pdev, sc->mem);

	pci_release_region(pdev, 0);

	pci_disable_device(pdev);