comedi_isadma_poll(9)

💅 comedi_isadma_poll — like, the Kernel API Manual page, bestie 🎀

okay so real quick before we get into it: this little icon lives in the Kernel API Manual (section 9, kernel API, iykyk), and it's all about polling a DMA transfer. yes, that DMA. let's go ✨

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🌸 NAME 🌸

comedi_isadma_poll — poll the current DMA transfer. that's it. that's the whole vibe check, and it passed 💅

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🦋 SYNOPSIS 🦋

unsigned int comedi_isadma_poll (struct comedi_isadma *dma );

look at that signature, it's giving "one job and doing it well" ✨ copy it exactly tho, no cap — every space is load-bearing 🫶

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🍓 ARGUMENTS 🍓

• dma — the ISA DMA you wanna poll. like, the actual one you're curious about. hand it over and let it spill 🔥

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💜 DESCRIPTION 💜

so what does it actually do, you ask? it returns the position (in bytes) of the current DMA transfer. that's the whole thing, bestie — you poke it, it tells you where the DMA currently is, in bytes. no more, no less. iconic behaviour, honestly 👑

ngl, it's a one-liner of a function conceptually, so don't go looking for extra lore that isn't here 💀

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/comedi/drivers/comedi_isadma.c — the source file, the main character energy itself 🧚
• comedi_isadma_program(9) — the friend who sets things up
• comedi_isadma_disable(9) — the friend who shuts it down
• comedi_isadma_disable_on_sample(9) — the friend who shuts it down on a sample, fancy 💅
• comedi_isadma_set_mode(9) — the friend who picks the mode
• comedi_isadma_alloc(9) — the friend who gets you one
• comedi_isadma_free(9) — the friend who cleans up after you

the whole isa-dma friend group, fr fr — go read them all, they're obsessed with each other 🫶

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and that's the page!! 💖 this little cutie came out of ./drivers/comedi/drivers back in October 2026, and yes it's still sitting there in the Kernel API Manual being adorable. slay, periodt, go poll something 🎀✨