From: Zhang Shurong zhang_shurong@foxmail.com
[ Upstream commit 0800880f4eb789b7d299db40f2e86e056bd33a4e ]
The pm_runtime_enable function increases the power disable depth, which means that we must perform a matching decrement on the error handling path to maintain balance within the given context. Additionally, we need to address the same issue for pm_runtime_get_sync. We fix this by invoking pm_runtime_disable and pm_runtime_put_sync when error returns.
Fixes: 82b81b3ec1a7 ("drm/tegra: dpaux: Implement runtime PM") Signed-off-by: Zhang Shurong zhang_shurong@foxmail.com Signed-off-by: Thierry Reding treding@nvidia.com Link: https://patchwork.freedesktop.org/patch/msgid/tencent_B13DB7F6C0023C46157250... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/tegra/dpaux.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/tegra/dpaux.c b/drivers/gpu/drm/tegra/dpaux.c index ef02d530f78d7..ae12d001a04bf 100644 --- a/drivers/gpu/drm/tegra/dpaux.c +++ b/drivers/gpu/drm/tegra/dpaux.c @@ -522,7 +522,7 @@ static int tegra_dpaux_probe(struct platform_device *pdev) if (err < 0) { dev_err(dpaux->dev, "failed to request IRQ#%u: %d\n", dpaux->irq, err); - return err; + goto err_pm_disable; }
disable_irq(dpaux->irq); @@ -542,7 +542,7 @@ static int tegra_dpaux_probe(struct platform_device *pdev) */ err = tegra_dpaux_pad_config(dpaux, DPAUX_PADCTL_FUNC_I2C); if (err < 0) - return err; + goto err_pm_disable;
#ifdef CONFIG_GENERIC_PINCONF dpaux->desc.name = dev_name(&pdev->dev); @@ -555,7 +555,8 @@ static int tegra_dpaux_probe(struct platform_device *pdev) dpaux->pinctrl = devm_pinctrl_register(&pdev->dev, &dpaux->desc, dpaux); if (IS_ERR(dpaux->pinctrl)) { dev_err(&pdev->dev, "failed to register pincontrol\n"); - return PTR_ERR(dpaux->pinctrl); + err = PTR_ERR(dpaux->pinctrl); + goto err_pm_disable; } #endif /* enable and clear all interrupts */ @@ -571,10 +572,15 @@ static int tegra_dpaux_probe(struct platform_device *pdev) err = devm_of_dp_aux_populate_ep_devices(&dpaux->aux); if (err < 0) { dev_err(dpaux->dev, "failed to populate AUX bus: %d\n", err); - return err; + goto err_pm_disable; }
return 0; + +err_pm_disable: + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + return err; }
static void tegra_dpaux_remove(struct platform_device *pdev)