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authorHans de Goede <hdegoede@redhat.com>2015-10-20 10:42:24 +0200
committerDavid S. Miller <davem@davemloft.net>2015-10-21 19:47:45 -0700
commit104eb270e665f4fcd8cb8c8ab4c4d4538c604e92 (patch)
tree14d46ad4b54ace2e94fd27be1cb49e30ce15a26e /drivers/net/ethernet/allwinner
parentopenvswitch: Serialize nested ct actions if provided (diff)
downloadlinux-dev-104eb270e665f4fcd8cb8c8ab4c4d4538c604e92.tar.xz
linux-dev-104eb270e665f4fcd8cb8c8ab4c4d4538c604e92.zip
net: sun4i-emac: Properly free resources on probe failure and remove
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>
Diffstat (limited to 'drivers/net/ethernet/allwinner')
-rw-r--r--drivers/net/ethernet/allwinner/sun4i-emac.c20
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/net/ethernet/allwinner/sun4i-emac.c b/drivers/net/ethernet/allwinner/sun4i-emac.c
index 48ce83e443c2..8d50314ac3eb 100644
--- a/drivers/net/ethernet/allwinner/sun4i-emac.c
+++ b/drivers/net/ethernet/allwinner/sun4i-emac.c
@@ -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");