drm_put_dev(9)

💅 drm_put_dev(9) — like, the kernel API manual edition ✨

Okay bestie, buckle up 🎀 this one lives in the Kernel API Manual, and it's the page about saying goodbye to a DRM device. Yes, we're doing a breakup arc. 💔

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🌸 NAME 🌸

drm_put_dev — unregister and release a DRM device. It's giving "closing the tab on a whole graphics device" energy. 🖥️✨

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🦋 SYNOPSIS 🦋

void drm_put_dev (struct drm_device *dev );

That's it. That's the whole signature. One function, one pointer, no cap. 💅

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🎀 ARGUMENTS 🎀

• dev — the DRM device. That's it. That's the whole argument. The main character of this function. 👑

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✨ DESCRIPTION ✨

So here's the tea ☕: this function gets called at module unload time, or when a PCI device is unplugged. Like when the hardware literally leaves the group chat. 🫠

It cleans up the entire DRM device, and on its way out it calls drm_lastclose. So it's not just leaving — it's tidying up, turning off the lights, and closing the door behind itself. Considerate icon behavior, honestly. 🚪✨

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💀 NOTE 💀

Bestie, listen to me. 🚨 Use of this function is deprecated. It will eventually go away completely. Not "maybe." Will. 😭

So instead of this, please use drm_dev_unregister and drm_dev_put — explicitly, like the independent queen you are 💅. Why? Because doing it that way makes sure that the device isn't userspace accessible any more while teardown is in progress, which ensures that userspace can't access an inconsistent state.

Translation: do it the explicit way so nothing in userspace can wander into the half-dismantled device like it's an abandoned party and touch stuff mid-teardown. 🙈 Not the vibe. Never the vibe.

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpu/drm/drm_drv.c
• driver instance overview(9)
• drm_dev_enter(9)
• drm_dev_exit(9)
• drm_dev_unplug(9)
• drm_dev_set_dma_dev(9)
• drm_dev_wedged_event(9)
• component helper usage recommendations(9)
• __drm_dev_alloc(9)
• drm_dev_alloc(9)
• drm_dev_get(9)
• drm_dev_put(9)
• drmm_cgroup_register_region(9)
• drm_dev_register(9)
• drm_dev_unregister(9)

Go read them. All of them. I believe in you. 🫶📚

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And that's the whole page, bestie!! 💖 This little cutie lives in ./drivers/gpu/drm, and this version is dated October 2026, still filed under drm_put_dev(9) — mwah, slay, periodt. 🎀✨🦋👑