diff options
| author | Pengpeng Hou <pengpeng@iscas.ac.cn> | 2026-06-23 09:55:01 +0800 |
|---|---|---|
| committer | Bjorn Andersson <andersson@kernel.org> | 2026-07-11 11:31:11 -0500 |
| commit | 75e918aa876440d8ad559a11d6ab87bddb1ed79a (patch) | |
| tree | 52a21b40e3d02d363e06b3eb981a94d1b50a6403 /drivers/soc/qcom | |
| parent | cfe9b47ef18bdb737be480f3e539e9561ef74078 (diff) | |
soc: qcom: rpmh-rsc: manage PM notifiers with devres
rpmh_rsc_probe() registers CPU PM or genpd notifiers before populating
child devices. If child population fails, the CPU PM notifier path is not
unwound and the genpd path needs open-coded cleanup.
Use devm_pm_runtime_enable() for the genpd path and
devm_add_action_or_reset() for both notifier registrations. This makes
probe failure and driver detach use the same cleanup model while keeping
devm_of_platform_populate() responsible for child devices.
Fixes: 25092e6100ac ("soc: qcom: rpmh-rsc: Attach RSC to cluster PM domain")
Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260623015501.31129-1-pengpeng@iscas.ac.cn
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Diffstat (limited to 'drivers/soc/qcom')
| -rw-r--r-- | drivers/soc/qcom/rpmh-rsc.c | 37 |
1 files changed, 26 insertions, 11 deletions
diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c index c6f7d5c9c493..66928ca40b9a 100644 --- a/drivers/soc/qcom/rpmh-rsc.c +++ b/drivers/soc/qcom/rpmh-rsc.c @@ -944,17 +944,30 @@ static int rpmh_rsc_pd_callback(struct notifier_block *nfb, return NOTIFY_OK; } +static void rpmh_rsc_pd_detach(void *data) +{ + dev_pm_genpd_remove_notifier(data); +} + static int rpmh_rsc_pd_attach(struct rsc_drv *drv, struct device *dev) { int ret; - pm_runtime_enable(dev); + ret = devm_pm_runtime_enable(dev); + if (ret) + return ret; + drv->genpd_nb.notifier_call = rpmh_rsc_pd_callback; ret = dev_pm_genpd_add_notifier(dev, &drv->genpd_nb); if (ret) - pm_runtime_disable(dev); + return ret; - return ret; + return devm_add_action_or_reset(dev, rpmh_rsc_pd_detach, dev); +} + +static void rpmh_rsc_cpu_pm_unregister(void *data) +{ + cpu_pm_unregister_notifier(data); } static int rpmh_probe_tcs_config(struct platform_device *pdev, struct rsc_drv *drv) @@ -1107,7 +1120,15 @@ static int rpmh_rsc_probe(struct platform_device *pdev) return ret; } else { drv->rsc_pm.notifier_call = rpmh_rsc_cpu_pm_callback; - cpu_pm_register_notifier(&drv->rsc_pm); + ret = cpu_pm_register_notifier(&drv->rsc_pm); + if (ret) + return ret; + + ret = devm_add_action_or_reset(&pdev->dev, + rpmh_rsc_cpu_pm_unregister, + &drv->rsc_pm); + if (ret) + return ret; } } @@ -1122,13 +1143,7 @@ static int rpmh_rsc_probe(struct platform_device *pdev) dev_set_drvdata(&pdev->dev, drv); drv->dev = &pdev->dev; - ret = devm_of_platform_populate(&pdev->dev); - if (ret && pdev->dev.pm_domain) { - dev_pm_genpd_remove_notifier(&pdev->dev); - pm_runtime_disable(&pdev->dev); - } - - return ret; + return devm_of_platform_populate(&pdev->dev); } static const struct of_device_id rpmh_drv_match[] = { |