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i2c: tegra: Properly disable runtime PM on driver's probe error 

One of the recent Tegra I2C commits made a change that resumes runtime PM
during driver's probe, but it missed to put the RPM in a case of error.
Note that it's not correct to use pm_runtime_status_suspended because it
breaks RPM refcounting.

Fixes: 8ebf15e9c8 ("i2c: tegra: Move suspend handling to NOIRQ phase")
Cc: <stable@vger.kernel.org> # v5.4+
Tested-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Dmitry Osipenko 2020-01-14 04:34:36 +03:00 committed by Wolfram Sang
parent 9f42de8d4e
commit 24a49678f5
1 changed files with 19 additions and 10 deletions
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29
drivers/i2c/busses/i2c-tegra.c
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@ -1608,14 +1608,18 @@ static int tegra_i2c_probe(struct platform_device *pdev)
}
pm_runtime_enable(&pdev->dev);
if (!pm_runtime_enabled(&pdev->dev))
if (!pm_runtime_enabled(&pdev->dev)) {
ret = tegra_i2c_runtime_resume(&pdev->dev);
else
if (ret < 0) {
dev_err(&pdev->dev, "runtime resume failed\n");
goto unprepare_div_clk;
}
} else {
ret = pm_runtime_get_sync(i2c_dev->dev);
if (ret < 0) {
dev_err(&pdev->dev, "runtime resume failed\n");
goto unprepare_div_clk;
if (ret < 0) {
dev_err(&pdev->dev, "runtime resume failed\n");
goto disable_rpm;
}
}
if (i2c_dev->is_multimaster_mode) {
@ -1623,7 +1627,7 @@ static int tegra_i2c_probe(struct platform_device *pdev)
if (ret < 0) {
dev_err(i2c_dev->dev, "div_clk enable failed %d\n",
ret);
goto disable_rpm;
goto put_rpm;
}
}
@ -1671,11 +1675,16 @@ disable_div_clk:
if (i2c_dev->is_multimaster_mode)
clk_disable(i2c_dev->div_clk);
disable_rpm:
pm_runtime_disable(&pdev->dev);
if (!pm_runtime_status_suspended(&pdev->dev))
put_rpm:
if (pm_runtime_enabled(&pdev->dev))
pm_runtime_put_sync(&pdev->dev);
else
tegra_i2c_runtime_suspend(&pdev->dev);
disable_rpm:
if (pm_runtime_enabled(&pdev->dev))
pm_runtime_disable(&pdev->dev);
unprepare_div_clk:
clk_unprepare(i2c_dev->div_clk);