pm_runtime_put_autosuspend(9)

👑 pm_runtime_put_autosuspend(9) 👑

okay bestie, welcome to the Kernel API Manual ✨ this one's a function page, it lives at pm_runtime_put_autosuspend(9), and it's honestly so iconic — let's get into it 🎀

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✨ NAME ✨

pm_runtime_put_autosuspend — updates the last access time of a device, drops its usage counter, and queues up an autosuspend if that usage counter hits 0. that's the whole vibe 💅

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🌸 SYNOPSIS 🌸

int pm_runtime_put_autosuspend (struct device *dev );

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🦋 ARGUMENTS 🦋

• dev — the target device, aka the main character of this whole operation 🫶

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💖 DESCRIPTION 💖

so here's what happens, no cap: it updates the last access time of dev, then decrements the runtime PM usage counter of dev. and if that counter turns out to be equal to 0, it queues up a work item for dev — same energy as what happens in pm_request_autosuspend. periodt 💅✨

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🌈 RETURN 🌈

like, what does it give you back? so many options, let's go:

• 1 — Success! the usage counter dropped to zero, but the device was already suspended (slay, she was ahead of you 😌).
• 0 — Success ✨ plain and simple.
• -EINVAL — Runtime PM error 🙈.
• -EACCES — Runtime PM is disabled 🚫.
• -EAGAIN — Runtime PM usage counter became non-zero, or a Runtime PM status change is ongoing 👀.
• -EBUSY — Runtime PM child_count is non-zero, the children are not letting her leave 💀.
• -EPERM — Device PM QoS resume latency 0 😭.
• -EINPROGRESS — a suspend is already in progress, give her a minute 🕐.
• -ENOSYS — CONFIG_PM is not enabled 🧚.

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🔥 SEE ALSO 🔥

okay this is the friend group, all of them, listed, no skips, iykyk:

Kernel file ./include/linux/pm_runtime.h 🎀

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_sync(9), pm_runtime_put_sync_suspend(9), pm_runtime_put_sync_autosuspend(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) 💜

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and that's the page!! 🫶 mwah, go forth and manage your runtime PM responsibly. this lil gem comes from ./include/linux and it's dated October 2026 — bookmark pm_runtime_put_autosuspend(9) and come back whenever, bestie 💖🎀✨