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serial: 8250-mtk: Fix reference leak in mtk8250_probe

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The pm_runtime_enable will increase power disable depth.
Thus a pairing decrement is needed on the error handling
path to keep it balanced according to context.

Fixes: e32a83c70c ("serial: 8250-mtk: modify mtk uart power and clock management")
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20201119141126.168850-1-zhangqilong3@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Zhang Qilong 2020-11-19 22:11:26 +08:00 committed by Greg Kroah-Hartman
parent 3b3e230924
commit 6e4e636e0e
1 changed files with 10 additions and 3 deletions
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13
drivers/tty/serial/8250/8250_mtk.c
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@ -572,15 +572,22 @@ static int mtk8250_probe(struct platform_device *pdev)
pm_runtime_enable(&pdev->dev);
err = mtk8250_runtime_resume(&pdev->dev);
if (err)
return err;
goto err_pm_disable;
data->line = serial8250_register_8250_port(&uart);
if (data->line < 0)
return data->line;
if (data->line < 0) {
err = data->line;
goto err_pm_disable;
}
data->rx_wakeup_irq = platform_get_irq_optional(pdev, 1);
return 0;
err_pm_disable:
pm_runtime_disable(&pdev->dev);
return err;
}
static int mtk8250_remove(struct platform_device *pdev)