wl12xx: refactor fw init into a new function

The fw boot and initialization currently happens inside the
add_interface() callback. This is wrong, as add_interface is
called for each new vif. However, we due to some fw limitation
(we have to know the actual mac address on boot), we can't
completely move it into the start() callback.

Until the fw will be fixed, refactor the fw init into
a new function, and call it from add_interface()
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

drivers/net/wireless/wl12xx/main.c

@@ -1888,13 +1888,80 @@ static int wl12xx_init_vif_data(struct ieee80211_vif *vif)
 	return 0;
 }
 
+static bool wl12xx_init_fw(struct wl1271 *wl)
+{
+	int retries = WL1271_BOOT_RETRIES;
+	bool booted = false;
+	struct wiphy *wiphy = wl->hw->wiphy;
+	int ret;
+
+	while (retries) {
+		retries--;
+		ret = wl1271_chip_wakeup(wl);
+		if (ret < 0)
+			goto power_off;
+
+		ret = wl1271_boot(wl);
+		if (ret < 0)
+			goto power_off;
+
+		ret = wl1271_hw_init(wl);
+		if (ret < 0)
+			goto irq_disable;
+
+		booted = true;
+		break;
+
+irq_disable:
+		mutex_unlock(&wl->mutex);
+		/* Unlocking the mutex in the middle of handling is
+		   inherently unsafe. In this case we deem it safe to do,
+		   because we need to let any possibly pending IRQ out of
+		   the system (and while we are WL1271_STATE_OFF the IRQ
+		   work function will not do anything.) Also, any other
+		   possible concurrent operations will fail due to the
+		   current state, hence the wl1271 struct should be safe. */
+		wl1271_disable_interrupts(wl);
+		wl1271_flush_deferred_work(wl);
+		cancel_work_sync(&wl->netstack_work);
+		mutex_lock(&wl->mutex);
+power_off:
+		wl1271_power_off(wl);
+	}
+
+	if (!booted) {
+		wl1271_error("firmware boot failed despite %d retries",
+			     WL1271_BOOT_RETRIES);
+		goto out;
+	}
+
+	wl1271_info("firmware booted (%s)", wl->chip.fw_ver_str);
+
+	/* update hw/fw version info in wiphy struct */
+	wiphy->hw_version = wl->chip.id;
+	strncpy(wiphy->fw_version, wl->chip.fw_ver_str,
+		sizeof(wiphy->fw_version));
+
+	/*
+	 * Now we know if 11a is supported (info from the NVS), so disable
+	 * 11a channels if not supported
+	 */
+	if (!wl->enable_11a)
+		wiphy->bands[IEEE80211_BAND_5GHZ]->n_channels = 0;
+
+	wl1271_debug(DEBUG_MAC80211, "11a is %ssupported",
+		     wl->enable_11a ? "" : "not ");
+
+	wl->state = WL1271_STATE_ON;
+out:
+	return booted;
+}
+
 static int wl1271_op_add_interface(struct ieee80211_hw *hw,
 				   struct ieee80211_vif *vif)
 {
 	struct wl1271 *wl = hw->priv;
-	struct wiphy *wiphy = hw->wiphy;
 	struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif);
-	int retries = WL1271_BOOT_RETRIES;
 	int ret = 0;
 	u8 role_type;
 	bool booted = false;
@@ -1930,32 +1997,24 @@ static int wl1271_op_add_interface(struct ieee80211_hw *hw,
 		ret = -EINVAL;
 		goto out;
 	}
+
+	/*
+	 * TODO: after the nvs issue will be solved, move this block
+	 * to start(), and make sure here the driver is ON.
+	 */
+	if (wl->state == WL1271_STATE_OFF) {
 		/*
 		 * we still need this in order to configure the fw
 		 * while uploading the nvs
 		 */
 		memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 
-	if (wl->state != WL1271_STATE_OFF) {
-		wl1271_error("cannot start because not in off state: %d",
-			     wl->state);
-		ret = -EBUSY;
+		booted = wl12xx_init_fw(wl);
+		if (!booted) {
+			ret = -EINVAL;
 			goto out;
 		}
-
-	while (retries) {
-		retries--;
-		ret = wl1271_chip_wakeup(wl);
-		if (ret < 0)
-			goto power_off;
-
-		ret = wl1271_boot(wl);
-		if (ret < 0)
-			goto power_off;
-
-		ret = wl1271_hw_init(wl);
-		if (ret < 0)
-			goto irq_disable;
+	}
 
 	if (wlvif->bss_type == BSS_TYPE_STA_BSS ||
 	    wlvif->bss_type == BSS_TYPE_IBSS) {
@@ -1969,64 +2028,20 @@ static int wl1271_op_add_interface(struct ieee80211_hw *hw,
 						 WL1271_ROLE_DEVICE,
 						 &wlvif->dev_role_id);
 		if (ret < 0)
-				goto irq_disable;
+			goto out;
 	}
 
 	ret = wl12xx_cmd_role_enable(wl, vif->addr,
 				     role_type, &wlvif->role_id);
 	if (ret < 0)
-			goto irq_disable;
+		goto out;
 
 	ret = wl1271_init_vif_specific(wl, vif);
 	if (ret < 0)
-			goto irq_disable;
-
-		booted = true;
-		break;
-
-irq_disable:
-		mutex_unlock(&wl->mutex);
-		/* Unlocking the mutex in the middle of handling is
-		   inherently unsafe. In this case we deem it safe to do,
-		   because we need to let any possibly pending IRQ out of
-		   the system (and while we are WL1271_STATE_OFF the IRQ
-		   work function will not do anything.) Also, any other
-		   possible concurrent operations will fail due to the
-		   current state, hence the wl1271 struct should be safe. */
-		wl1271_disable_interrupts(wl);
-		wl1271_flush_deferred_work(wl);
-		cancel_work_sync(&wl->netstack_work);
-		mutex_lock(&wl->mutex);
-power_off:
-		wl1271_power_off(wl);
-	}
-
-	if (!booted) {
-		wl1271_error("firmware boot failed despite %d retries",
-			     WL1271_BOOT_RETRIES);
 		goto out;
-	}
 
 	wl->vif = vif;
-	wl->state = WL1271_STATE_ON;
 	set_bit(WL1271_FLAG_IF_INITIALIZED, &wl->flags);
-	wl1271_info("firmware booted (%s)", wl->chip.fw_ver_str);
-
-	/* update hw/fw version info in wiphy struct */
-	wiphy->hw_version = wl->chip.id;
-	strncpy(wiphy->fw_version, wl->chip.fw_ver_str,
-		sizeof(wiphy->fw_version));
-
-	/*
-	 * Now we know if 11a is supported (info from the NVS), so disable
-	 * 11a channels if not supported
-	 */
-	if (!wl->enable_11a)
-		wiphy->bands[IEEE80211_BAND_5GHZ]->n_channels = 0;
-
-	wl1271_debug(DEBUG_MAC80211, "11a is %ssupported",
-		     wl->enable_11a ? "" : "not ");
-
 out:
 	mutex_unlock(&wl->mutex);