[wireless-next][PATCH 1/2] b43: ssb: refuse to support more than IEEE 802.11 core

[Rafał Miłecki]

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 <zaj...@gmail.com>
---
With this patchset I'm still able to use my BCM4321, so I guess it's
alright & safe :)
---
 drivers/net/wireless/b43/main.c | 37 ++++++++++++++++++++-----------------
 1 file changed, 20 insertions(+), 17 deletions(-)

diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index 69fc3d6..cf84cf2 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/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;
 }
 
-- 
1.8.4.5


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