[PATCH] net: dsa: bcm_sf2: Unwind errors in correct order

[Florian Fainelli]

In case we cannot complete bcm_sf2_sw_setup() for any reason, and we
go to the out_unmap label, but the MDIO bus has not been registered yet,
we will hit the BUG condition in drivers/net/phy/mdio_bus.c about the
bus not being registered. Fix this by dedicating a specific lable for
when we fail after the MDIO bus has been successfully registered.

Fixes: 461cd1b03e32 ("net: dsa: bcm_sf2: Register our slave MDIO bus")
Signed-off-by: Florian Fainelli <f.faine...@gmail.com>
---
 drivers/net/dsa/bcm_sf2.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index cd1d630ae3a9..b2b838724a9b 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -1622,7 +1622,7 @@ static int bcm_sf2_sw_setup(struct dsa_switch *ds)
                          "switch_0", priv);
        if (ret < 0) {
                pr_err("failed to request switch_0 IRQ\n");
-               goto out_unmap;
+               goto out_mdio;
        }
 
        ret = request_irq(priv->irq1, bcm_sf2_switch_1_isr, 0,
@@ -1679,6 +1679,8 @@ static int bcm_sf2_sw_setup(struct dsa_switch *ds)
 
 out_free_irq0:
        free_irq(priv->irq0, priv);
+out_mdio:
+       bcm_sf2_mdio_unregister(priv);
 out_unmap:
        base = &priv->core;
        for (i = 0; i < BCM_SF2_REGS_NUM; i++) {
@@ -1686,7 +1688,6 @@ out_unmap:
                        iounmap(*base);
                base++;
        }
-       bcm_sf2_mdio_unregister(priv);
        return ret;
 }
 
-- 
2.7.4