__pm_runtime..._autosuspend(9)

🦋 __pm_runtime..._autosuspend — a Kernel API Manual moment 💅

okay so bestie, welcome to the kernel API manual, this one's about __pm_runtime..._autosuspend and honestly it's giving "one tiny function, whole lot of lore" ✨

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🌸 NAME 🌸

__pm_runtime_put_autosuspend — drop the device usage counter and, if it hits 0, queue up an autosuspend. 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. the main character of this whole operation 💖

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💜 DESCRIPTION 💜

so what it does: it decrements the runtime PM usage counter on dev, and if that counter turns out to be equal to 0, it queues up a work item for dev — exactly like in pm_request_autosuspend. no cap, that's it. lowkey elegant 🧚

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🔥 RETURN 🔥

• 1 — success! 🎉 the usage counter dropped to zero, but the device was already suspended. so like, mission accomplished, nobody had to do anything.
• 0 — success. periodt.
• -EINVAL — runtime PM error 😭
• -EACCES — runtime PM is disabled 🙈
• -EAGAIN — the runtime PM usage counter became non-zero, or a runtime PM status change is ongoing. awkward 💀
• -EBUSY — the runtime PM child_count is non-zero. the children said "not today" 👑
• -EPERM — device PM QoS resume latency is 0.
• -EINPROGRESS — a suspend is already in progress, bestie, hold please ⏳
• -ENOSYS — CONFIG_PM isn't enabled. so the function is literally not a thing here 💅

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🌈 SEE ALSO 🌈

kernel file ./include/linux/pm_runtime.h, plus the whole friend group 🫶:

• 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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ngl the ... in the title is doing a lot of heavy lifting, but that's the page name and we respect it 🎀

okay that's the whole read, mwah 💋 this page lives in ./include/linux and it's dated October 2026 — iykyk, go forth and suspend responsibly bestie 🦋✨