TI DaVinci EMAC: Handle emac module clock correctly.
In the driver probe function the emac module clock needs to be enabled before calling register_netdev(). As soon as the device is registered the driver get_stats function can be invoked by the core - the module clock must be switched on to be able to read from stats registers. Also explicitly call matching clk_disable for failure conditions in probe function. Signed-off-by: Sriramakrishnan <srk@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -2711,6 +2711,8 @@ static int __devinit davinci_emac_probe(struct platform_device *pdev)
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SET_ETHTOOL_OPS(ndev, ðtool_ops);
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netif_napi_add(ndev, &priv->napi, emac_poll, EMAC_POLL_WEIGHT);
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clk_enable(emac_clk);
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/* register the network device */
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SET_NETDEV_DEV(ndev, &pdev->dev);
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rc = register_netdev(ndev);
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@ -2720,7 +2722,6 @@ static int __devinit davinci_emac_probe(struct platform_device *pdev)
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goto netdev_reg_err;
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}
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clk_enable(emac_clk);
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/* MII/Phy intialisation, mdio bus registration */
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emac_mii = mdiobus_alloc();
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@ -2760,6 +2761,7 @@ mdiobus_quit:
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netdev_reg_err:
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mdio_alloc_err:
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clk_disable(emac_clk);
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no_irq_res:
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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release_mem_region(res->start, res->end - res->start + 1);
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