pm_runtime_..._autosuspend(9)

💫 pm_runtime_..._autosuspend(9) 💫

okay so this is the Kernel API Manual page for pm_runtime_put_sync_autosuspend — and it’s giving “drop the usage counter and maybe autosuspend” energy, no cap 💅.

🌸 NAME 🌸

pm_runtime_put_sync_autosuspend — update the last access time of a device, drop the device usage counter, and autosuspend if it’s 0. 🫶

💅 SYNOPSIS 💅

int pm_runtime_put_sync_autosuspend (struct device *dev );

🎀 ARGUMENTS 🎀

• dev — target device 👀

💖 DESCRIPTION 💖

okay so this one updates the last access time of dev, then decrements the runtime PM usage counter of dev. if that counter turns out to be equal to 0, it sets up autosuspend of dev or suspends it synchronously — depending on whether or not autosuspend has been enabled for it ✨.

🚨 bestie, important: the runtime PM usage counter of dev remains decremented in all cases, even if it returns an error code. fr fr.

🌀 RETURN 🌀

• 1 — Success. Usage counter dropped to zero, but device was already suspended. 🎉
• 0 — Success. 👑
• -EINVAL — Runtime PM error. 😭
• -EACCES — Runtime PM disabled. 🙈
• -EAGAIN — Runtime PM usage counter became non-zero or Runtime PM status change ongoing. 🌪️
• -EBUSY — Runtime PM child_count non-zero. 💀
• -EPERM — Device PM QoS resume latency 0. 🚫
• -EINPROGRESS — Suspend already in progress. ⏳
• -ENOSYS — CONFIG_PM not enabled. 🧚

Other values and conditions for the above values are possible as returned by Runtime PM suspend callbacks. iykyk 💜

🦋 SEE ALSO 🦋

Kernel file: ./include/linux/pm_runtime.h — plus the whole bestie roll call: pm_suspend_ignore_children(9), pm_runtime_get_noresume(9), pm_runtime_put_noidle(9), pm_runtime_suspended(9), pm_runtime_active(9), pm_runtime_status_suspended(9), pm_runtime_enabled(9), pm_runtime_blocked(9), pm_runtime_has_no_callbacks(9), pm_runtime_mark_last_busy(9), pm_runtime_is_irq_safe(9), pm_runtime_idle(9), pm_runtime_suspend(9), pm_runtime_autosuspend(9), pm_runtime_resume(9), pm_request_idle(9), pm_request_resume(9), pm_request_autosuspend(9), pm_runtime_get(9), pm_runtime_get_sync(9), pm_runtime_resume_and_get(9), pm_runtime_put(9), __pm_runtime_put_autosuspend(9), pm_runtime_put_autosuspend(9), pm_runtime_put_sync(9), pm_runtime_put_sync_suspend(9), pm_runtime_set_active(9), pm_runtime_set_suspended(9), pm_runtime_disable(9), pm_runtime_use_autosuspend(9), pm_runtime_dont_use_autosuspend(9). obsessed with this list tbh 💅

mwah 💖 source: ./include/linux; date: October 2026; page: pm_runtime_..._autosuspend(9) — that’s the whole Kernel API Manual moment, bye bestie 🎀