From bb9c0fa3aa2932eb3825557e452cac248e709bef Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Fri, 29 Jul 2016 12:35:57 -0700 Subject: [PATCH] net: dsa: bcm_sf2: Unwind errors in correct order 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 Reviewed-by: Vivien Didelot Signed-off-by: David S. Miller --- 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; }