b43: ssb: refuse to support more than IEEE 802.11 core

Some ancient Broadcom devices had one core per band, e.g.:
ssb: Found chip with id 0x4306, rev 0x02 and package 0x00
ssb: Core 0 found: ChipCommon (cc 0x800, rev 0x02, vendor 0x4243)
ssb: Core 1 found: IEEE 802.11 (cc 0x812, rev 0x04, vendor 0x4243)
ssb: Core 2 found: PCMCIA (cc 0x80D, rev 0x01, vendor 0x4243)
ssb: Core 3 found: V90 (cc 0x807, rev 0x01, vendor 0x4243)
ssb: Core 4 found: PCI (cc 0x804, rev 0x07, vendor 0x4243)
ssb: Core 5 found: IEEE 802.11 (cc 0x812, rev 0x04, vendor 0x4243)

This hardware model was dropped for newer devices handled by b43.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43/main.c

@@ -5486,39 +5486,42 @@ int b43_ssb_probe(struct ssb_device *sdev, const struct ssb_device_id *id)
 	struct b43_bus_dev *dev;
 	struct b43_wl *wl;
 	int err;
-	int first = 0;
 
 	dev = b43_bus_dev_ssb_init(sdev);
 	if (!dev)
 		return -ENOMEM;
 
 	wl = ssb_get_devtypedata(sdev);
-	if (!wl) {
-		/* Probing the first core. Must setup common struct b43_wl */
-		first = 1;
-		b43_sprom_fixup(sdev->bus);
-		wl = b43_wireless_init(dev);
-		if (IS_ERR(wl)) {
-			err = PTR_ERR(wl);
-			goto out;
-		}
-		ssb_set_devtypedata(sdev, wl);
-		B43_WARN_ON(ssb_get_devtypedata(sdev) != wl);
+	if (wl) {
+		b43err(NULL, "Dual-core devices are not supported\n");
+		err = -ENOTSUPP;
+		goto err_ssb_kfree_dev;
 	}
+
+	b43_sprom_fixup(sdev->bus);
+
+	wl = b43_wireless_init(dev);
+	if (IS_ERR(wl)) {
+		err = PTR_ERR(wl);
+		goto err_ssb_kfree_dev;
+	}
+	ssb_set_devtypedata(sdev, wl);
+	B43_WARN_ON(ssb_get_devtypedata(sdev) != wl);
+
 	err = b43_one_core_attach(dev, wl);
 	if (err)
-		goto err_wireless_exit;
+		goto err_ssb_wireless_exit;
 
 	/* setup and start work to load firmware */
 	INIT_WORK(&wl->firmware_load, b43_request_firmware);
 	schedule_work(&wl->firmware_load);
 
-      out:
 	return err;
 
-      err_wireless_exit:
-	if (first)
-		b43_wireless_exit(dev, wl);
+err_ssb_wireless_exit:
+	b43_wireless_exit(dev, wl);
+err_ssb_kfree_dev:
+	kfree(dev);
 	return err;
 }