102 lines
2.7 KiB
Diff
102 lines
2.7 KiB
Diff
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From d0423d3e4fa7ae305729cb50369427f075ccb279 Mon Sep 17 00:00:00 2001
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From: Jonas Gorski <jonas.gorski@gmail.com>
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Date: Sat, 25 Feb 2017 12:41:28 +0100
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Subject: [PATCH 1/6] bcm63xx_enet: correct clock usage
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Check the return code of prepare_enable and change one last instance of
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enable only to prepare_enable. Also properly disable and release the
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clock in error paths and on remove for enetsw.
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Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
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---
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drivers/net/ethernet/broadcom/bcm63xx_enet.c | 31 +++++++++++++++++++++-------
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1 file changed, 23 insertions(+), 8 deletions(-)
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--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
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+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
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@@ -1773,7 +1773,9 @@ static int bcm_enet_probe(struct platfor
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ret = PTR_ERR(priv->mac_clk);
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goto out;
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}
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- clk_prepare_enable(priv->mac_clk);
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+ ret = clk_prepare_enable(priv->mac_clk);
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+ if (ret)
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+ goto out_put_clk_mac;
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/* initialize default and fetch platform data */
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priv->rx_ring_size = BCMENET_DEF_RX_DESC;
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@@ -1805,9 +1807,11 @@ static int bcm_enet_probe(struct platfor
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if (IS_ERR(priv->phy_clk)) {
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ret = PTR_ERR(priv->phy_clk);
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priv->phy_clk = NULL;
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- goto out_put_clk_mac;
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+ goto out_disable_clk_mac;
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}
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- clk_prepare_enable(priv->phy_clk);
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+ ret = clk_prepare_enable(priv->phy_clk);
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+ if (ret)
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+ goto out_put_clk_phy;
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}
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/* do minimal hardware init to be able to probe mii bus */
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@@ -1901,13 +1905,16 @@ out_free_mdio:
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out_uninit_hw:
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/* turn off mdc clock */
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enet_writel(priv, 0, ENET_MIISC_REG);
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- if (priv->phy_clk) {
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+ if (priv->phy_clk)
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clk_disable_unprepare(priv->phy_clk);
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+
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+out_put_clk_phy:
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+ if (priv->phy_clk)
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clk_put(priv->phy_clk);
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- }
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-out_put_clk_mac:
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+out_disable_clk_mac:
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clk_disable_unprepare(priv->mac_clk);
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+out_put_clk_mac:
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clk_put(priv->mac_clk);
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out:
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free_netdev(dev);
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@@ -2752,7 +2759,9 @@ static int bcm_enetsw_probe(struct platf
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ret = PTR_ERR(priv->mac_clk);
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goto out_unmap;
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}
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- clk_enable(priv->mac_clk);
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+ ret = clk_prepare_enable(priv->mac_clk);
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+ if (ret)
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+ goto out_put_clk;
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priv->rx_chan = 0;
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priv->tx_chan = 1;
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@@ -2773,7 +2782,7 @@ static int bcm_enetsw_probe(struct platf
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ret = register_netdev(dev);
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if (ret)
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- goto out_put_clk;
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+ goto out_disable_clk;
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netif_carrier_off(dev);
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platform_set_drvdata(pdev, dev);
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@@ -2782,6 +2791,9 @@ static int bcm_enetsw_probe(struct platf
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return 0;
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+out_disable_clk:
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+ clk_disable_unprepare(priv->mac_clk);
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+
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out_put_clk:
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clk_put(priv->mac_clk);
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@@ -2813,6 +2825,9 @@ static int bcm_enetsw_remove(struct plat
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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release_mem_region(res->start, resource_size(res));
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+ clk_disable_unprepare(priv->mac_clk);
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+ clk_put(priv->mac_clk);
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+
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free_netdev(dev);
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return 0;
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}
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