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net: sun4i-emac: Properly free resources on probe failure and remove

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Fix sun4i-emac not releasing the following resources:
-iomapped memory not released on probe-failure nor on remove
-clock not getting disabled on probe-failure nor on remove
-sram not being released on remove

And while at it also add error checking to the clk_prepare_enable call
done on probe.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hans de Goede 2015-10-20 10:42:24 +02:00 committed by David S. Miller
parent e754ec69ab
commit 104eb270e6
1 changed files with 16 additions and 4 deletions
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20
drivers/net/ethernet/allwinner/sun4i-emac.c
View File

@ -847,21 +847,25 @@ static int emac_probe(struct platform_device *pdev)
if (ndev->irq == -ENXIO) {
netdev_err(ndev, "No irq resource\n");
ret = ndev->irq;
goto out;
goto out_iounmap;
}
db->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(db->clk)) {
ret = PTR_ERR(db->clk);
goto out;
goto out_iounmap;
}
clk_prepare_enable(db->clk);
ret = clk_prepare_enable(db->clk);
if (ret) {
dev_err(&pdev->dev, "Error couldn't enable clock (%d)\n", ret);
goto out_iounmap;
}
ret = sunxi_sram_claim(&pdev->dev);
if (ret) {
dev_err(&pdev->dev, "Error couldn't map SRAM to device\n");
goto out;
goto out_clk_disable_unprepare;
}
db->phy_node = of_parse_phandle(np, "phy", 0);
@ -910,6 +914,10 @@ static int emac_probe(struct platform_device *pdev)
out_release_sram:
sunxi_sram_release(&pdev->dev);
out_clk_disable_unprepare:
clk_disable_unprepare(db->clk);
out_iounmap:
iounmap(db->membase);
out:
dev_err(db->dev, "not found (%d).\n", ret);
@ -921,8 +929,12 @@ out:
static int emac_remove(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct emac_board_info *db = netdev_priv(ndev);
unregister_netdev(ndev);
sunxi_sram_release(&pdev->dev);
clk_disable_unprepare(db->clk);
iounmap(db->membase);
free_netdev(ndev);
dev_dbg(&pdev->dev, "released and freed device\n");