Commit d961a58d authored by Chuhong Yuan's avatar Chuhong Yuan Committed by Greg Kroah-Hartman
Browse files

net: fec: fix clock count mis-match

commit a31eda65 upstream.

pm_runtime_put_autosuspend in probe will call runtime suspend to
disable clks automatically if CONFIG_PM is defined. (If CONFIG_PM
is not defined, its implementation will be empty, then runtime
suspend will not be called.)

Therefore, we can call pm_runtime_get_sync to runtime resume it
first to enable clks, which matches the runtime suspend. (Only when
CONFIG_PM is defined, otherwise pm_runtime_get_sync will also be
empty, then runtime resume will not be called.)

Then it is fine to disable clks without causing clock count mis-match.

Fixes: c43eab3e

 ("net: fec: add missed clk_disable_unprepare in remove")
Signed-off-by: default avatarChuhong Yuan <hslester96@gmail.com>
Acked-by: default avatarFugang Duan <fugang.duan@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Cc: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 15d6d766
......@@ -3530,6 +3530,11 @@ fec_drv_remove(struct platform_device *pdev)
struct net_device *ndev = platform_get_drvdata(pdev);
struct fec_enet_private *fep = netdev_priv(ndev);
struct device_node *np = pdev->dev.of_node;
int ret;
ret = pm_runtime_get_sync(&pdev->dev);
if (ret < 0)
return ret;
cancel_work_sync(&fep->tx_timeout_work);
fec_ptp_stop(pdev);
......@@ -3537,15 +3542,17 @@ fec_drv_remove(struct platform_device *pdev)
fec_enet_mii_remove(fep);
if (fep->reg_phy)
regulator_disable(fep->reg_phy);
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
clk_disable_unprepare(fep->clk_ahb);
clk_disable_unprepare(fep->clk_ipg);
if (of_phy_is_fixed_link(np))
of_phy_deregister_fixed_link(np);
of_node_put(fep->phy_node);
free_netdev(ndev);
clk_disable_unprepare(fep->clk_ahb);
clk_disable_unprepare(fep->clk_ipg);
pm_runtime_put_noidle(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return 0;
}
......
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