comedi_pci_detach(9)

💅 comedi_pci_detach — a whole manual page, bestie

okay so this is a page from the Kernel API Manual and it's literally about the comedi_pci_detach(9) function, and by the end of this you're gonna know it like the back of your hand. no cap. 🫶

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✨ NAME ✨

comedi_pci_detach — the generic "detach" handler for PCI COMEDI drivers. that's it, that's the whole name section, and it ate. 💖

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🌸 SYNOPSIS 🌸

void comedi_pci_detach (struct comedi_device *dev );

yes that's the whole signature. gorgeous. iconic. one argument. 🎀

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🦋 ARGUMENTS 🦋

• dev — the COMEDI device. that's your one (1) parameter, and she's a pointer to a struct comedi_device. main character energy fr. 👑

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💜 DESCRIPTION 💜

so here's the vibe. COMEDI drivers for PCI devices — but only the ones that need no special clean-up of private data and have no ioremapped regions other than the one that dev->mmio points to — can use this function as their "detach" handler. the COMEDI core calls it when a COMEDI device is being detached from the low-level driver. 💫

and bestie, it can also be called from a more specific "detach" handler that does extra clean-up on top. so she's flexible like that. 😌

here's exactly what she does, no more no less:

• frees the IRQ if dev->irq is non-zero 🔥
• iounmaps dev->mmio if it is non-NULL 🧚
• calls comedi_pci_disable to release the PCI device's regions and disable it 💅

that's the whole to-do list. three things. she's efficient and we love that for her.

ngl, this is a "generic" handler, so the important caveat is right there in the description: if your driver does have private data clean-up or extra ioremapped regions, this alone is not gonna cut it — that's exactly why the more specific "detach" handler situation exists. 🫶

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/comedi/comedi_pci.c — go read the source, iykyk 📖
• comedi_to_pci_dev(9)
• comedi_pci_enable(9)
• comedi_pci_disable(9)
• comedi_pci_auto_config(9)
• comedi_pci_auto_unconfig(9)
• comedi_pci_driver_register(9)
• comedi_pci_driver_unregister(9)

like, the whole friend group. go say hi to all of them. 👯‍♀️

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and that's the page!! 💖 this one lives under ./drivers/comedi and it's dated October 2026, and she's part of the Kernel API Manual — so yeah, mwah, go detach responsibly, ily, bye!! 🌸🦋✨