brcmfmac: split brcmf_attach() and brcmf_detach() functions

Move code allocating/freeing wiphy out of above functions. This will
allow reinitializing the driver (e.g. on some error) without allocating
a new wiphy.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/broadcom/brcm80211/brcmfmac/bus.h

@@ -253,10 +253,12 @@ void brcmf_rx_frame(struct device *dev, struct sk_buff *rxp, bool handle_event);
 /* Receive async event packet from firmware. Callee disposes of rxp. */
 void brcmf_rx_event(struct device *dev, struct sk_buff *rxp);
 
+int brcmf_alloc(struct device *dev, struct brcmf_mp_device *settings);
 /* Indication from bus module regarding presence/insertion of dongle. */
-int brcmf_attach(struct device *dev, struct brcmf_mp_device *settings);
+int brcmf_attach(struct device *dev);
 /* Indication from bus module regarding removal/absence of dongle */
 void brcmf_detach(struct device *dev);
+void brcmf_free(struct device *dev);
 /* Indication from bus module that dongle should be reset */
 void brcmf_dev_reset(struct device *dev);
 /* Request from bus module to initiate a coredump */

drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c

@@ -1209,13 +1209,11 @@ static int brcmf_bus_started(struct brcmf_pub *drvr, struct cfg80211_ops *ops)
 	return ret;
 }
 
-int brcmf_attach(struct device *dev, struct brcmf_mp_device *settings)
+int brcmf_alloc(struct device *dev, struct brcmf_mp_device *settings)
 {
 	struct wiphy *wiphy;
 	struct cfg80211_ops *ops;
 	struct brcmf_pub *drvr = NULL;
-	int ret = 0;
-	int i;
 
 	brcmf_dbg(TRACE, "Enter\n");
 
@@ -1233,6 +1231,21 @@ int brcmf_attach(struct device *dev, struct brcmf_mp_device *settings)
 	drvr = wiphy_priv(wiphy);
 	drvr->wiphy = wiphy;
 	drvr->ops = ops;
+	drvr->bus_if = dev_get_drvdata(dev);
+	drvr->bus_if->drvr = drvr;
+	drvr->settings = settings;
+
+	return 0;
+}
+
+int brcmf_attach(struct device *dev)
+{
+	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
+	struct brcmf_pub *drvr = bus_if->drvr;
+	int ret = 0;
+	int i;
+
+	brcmf_dbg(TRACE, "Enter\n");
 
 	for (i = 0; i < ARRAY_SIZE(drvr->if2bss); i++)
 		drvr->if2bss[i] = BRCMF_BSSIDX_INVALID;
@@ -1241,9 +1254,6 @@ int brcmf_attach(struct device *dev, struct brcmf_mp_device *settings)
 
 	/* Link to bus module */
 	drvr->hdrlen = 0;
-	drvr->bus_if = dev_get_drvdata(dev);
-	drvr->bus_if->drvr = drvr;
-	drvr->settings = settings;
 
 	/* Attach and link in the protocol */
 	ret = brcmf_proto_attach(drvr);
@@ -1259,7 +1269,7 @@ int brcmf_attach(struct device *dev, struct brcmf_mp_device *settings)
 	/* attach firmware event handler */
 	brcmf_fweh_attach(drvr);
 
-	ret = brcmf_bus_started(drvr, ops);
+	ret = brcmf_bus_started(drvr, drvr->ops);
 	if (ret != 0) {
 		bphy_err(drvr, "dongle is not responding: err=%d\n", ret);
 		goto fail;
@@ -1351,6 +1361,15 @@ void brcmf_detach(struct device *dev)
 		brcmf_cfg80211_detach(drvr->config);
 		drvr->config = NULL;
 	}
+}
+
+void brcmf_free(struct device *dev)
+{
+	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
+	struct brcmf_pub *drvr = bus_if->drvr;
+
+	if (!drvr)
+		return;
 
 	bus_if->drvr = NULL;
 

drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c

@@ -1430,6 +1430,7 @@ static int brcmf_pcie_reset(struct device *dev)
 	brcmf_pcie_bus_console_read(devinfo, true);
 
 	brcmf_detach(dev);
+	brcmf_free(dev);
 
 	brcmf_pcie_release_irq(devinfo);
 	brcmf_pcie_release_scratchbuffers(devinfo);
@@ -1824,11 +1825,18 @@ static void brcmf_pcie_setup(struct device *dev, int ret,
 
 	brcmf_pcie_intr_enable(devinfo);
 	brcmf_pcie_hostready(devinfo);
-	if (brcmf_attach(&devinfo->pdev->dev, devinfo->settings) == 0)
-		return;
+
+	ret = brcmf_alloc(&devinfo->pdev->dev, devinfo->settings);
+	if (ret)
+		goto fail;
+	ret = brcmf_attach(&devinfo->pdev->dev);
+	if (ret)
+		goto fail;
 
 	brcmf_pcie_bus_console_read(devinfo, false);
 
+	return;
+
 fail:
 	device_release_driver(dev);
 }
@@ -1971,6 +1979,7 @@ brcmf_pcie_remove(struct pci_dev *pdev)
 		brcmf_pcie_intr_disable(devinfo);
 
 	brcmf_detach(&pdev->dev);
+	brcmf_free(&pdev->dev);
 
 	kfree(bus->bus_priv.pcie);
 	kfree(bus->msgbuf->flowrings);

drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c

@@ -4247,17 +4247,26 @@ static void brcmf_sdio_firmware_callback(struct device *dev, int err,
 	sdiod->bus_if->chip = bus->ci->chip;
 	sdiod->bus_if->chiprev = bus->ci->chiprev;
 
+	err = brcmf_alloc(sdiod->dev, sdiod->settings);
+	if (err) {
+		brcmf_err("brcmf_alloc failed\n");
+		goto claim;
+	}
+
 	/* Attach to the common layer, reserve hdr space */
-	err = brcmf_attach(sdiod->dev, sdiod->settings);
+	err = brcmf_attach(sdiod->dev);
 	if (err != 0) {
 		brcmf_err("brcmf_attach failed\n");
-		sdio_claim_host(sdiod->func1);
-		goto checkdied;
+		goto free;
 	}
 
 	/* ready */
 	return;
 
+free:
+	brcmf_free(sdiod->dev);
+claim:
+	sdio_claim_host(sdiod->func1);
 checkdied:
 	brcmf_sdio_checkdied(bus);
 release:

drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c

@@ -1178,8 +1178,12 @@ static void brcmf_usb_probe_phase2(struct device *dev, int ret,
 	if (ret)
 		goto error;
 
+	ret = brcmf_alloc(devinfo->dev, devinfo->settings);
+	if (ret)
+		goto error;
+
 	/* Attach to the common driver interface */
-	ret = brcmf_attach(devinfo->dev, devinfo->settings);
+	ret = brcmf_attach(devinfo->dev);
 	if (ret)
 		goto error;
 
@@ -1251,7 +1255,10 @@ static int brcmf_usb_probe_cb(struct brcmf_usbdev_info *devinfo)
 	}
 
 	if (!brcmf_usb_dlneeded(devinfo)) {
-		ret = brcmf_attach(devinfo->dev, devinfo->settings);
+		ret = brcmf_alloc(devinfo->dev, devinfo->settings);
+		if (ret)
+			goto fail;
+		ret = brcmf_attach(devinfo->dev);
 		if (ret)
 			goto fail;
 		/* we are done */
@@ -1279,6 +1286,7 @@ static int brcmf_usb_probe_cb(struct brcmf_usbdev_info *devinfo)
 
 fail:
 	/* Release resources in reverse order */
+	brcmf_free(devinfo->dev);
 	kfree(bus);
 	brcmf_usb_detach(devinfo);
 	return ret;
@@ -1292,6 +1300,7 @@ brcmf_usb_disconnect_cb(struct brcmf_usbdev_info *devinfo)
 	brcmf_dbg(USB, "Enter, bus_pub %p\n", devinfo);
 
 	brcmf_detach(devinfo->dev);
+	brcmf_free(devinfo->dev);
 	kfree(devinfo->bus_pub.bus);
 	brcmf_usb_detach(devinfo);
 }
@@ -1435,10 +1444,12 @@ static int brcmf_usb_suspend(struct usb_interface *intf, pm_message_t state)
 
 	brcmf_dbg(USB, "Enter\n");
 	devinfo->bus_pub.state = BRCMFMAC_USB_STATE_SLEEP;
-	if (devinfo->wowl_enabled)
+	if (devinfo->wowl_enabled) {
 		brcmf_cancel_all_urbs(devinfo);
-	else
+	} else {
 		brcmf_detach(&usb->dev);
+		brcmf_free(&usb->dev);
+	}
 	return 0;
 }
 
@@ -1451,8 +1462,19 @@ static int brcmf_usb_resume(struct usb_interface *intf)
 	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
 
 	brcmf_dbg(USB, "Enter\n");
-	if (!devinfo->wowl_enabled)
-		return brcmf_attach(devinfo->dev, devinfo->settings);
+	if (!devinfo->wowl_enabled) {
+		int err;
+
+		err = brcmf_alloc(&usb->dev, devinfo->settings);
+		if (err)
+			return err;
+
+		err = brcmf_attach(devinfo->dev);
+		if (err) {
+			brcmf_free(devinfo->dev);
+			return err;
+		}
+	}
 
 	devinfo->bus_pub.state = BRCMFMAC_USB_STATE_UP;
 	brcmf_usb_rx_fill_all(devinfo);