ishtp_cl_free_dma_buf(9)

💅 ishtp_cl_free_dma_buf(9) — like, the Kernel API Manual edition 🎀

okay bestie, so we're in the Kernel API Manual today and this page is literally about one tiny function that cleans up after the drama. it's giving "janitor of the ISH world" and honestly? iconic. ✨

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🌸 NAME 🌸

ishtp_cl_free_dma_buf — the one that frees the DMA RX and TX buffers 💖

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✨ SYNOPSIS ✨

void ishtp_cl_free_dma_buf (struct ishtp_device *dev );

no return value, no cap. it just does the thing and dips. 🫶

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🦋 ARGUMENTS 🦋

• dev — the ishtp device, aka the main character of this whole operation 👑

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💀 DESCRIPTION 💀

okay so picture this: it's cleanup time. ishtp_cl_free_dma_buf frees the DMA buffer when all clients are released. bye bye buffers, slay. 🧹✨

but now the important part, bestie, don't skip this — this only happens during the error path in the ISH built-in driver model. literally only then. not the happy path, not a normal day, just the error path. iykyk 😭

so yeah, this isn't your everyday "free my stuff" call — it's the error-path cleanup era, and you should lowkey respect it for showing up at the worst moments. 💅

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/hid/intel-ish-hid/ishtp/dma-if.c — the vibe check source, go read it 📖
• ishtp_cl_alloc_dma_buf(9) — the alloc counterpart, the one that takes instead of gives 🌈

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and that's the whole page, bestie, no notes 💜 this glam little doc lives over in ./drivers/hid/intel-ish-hid/ishtp, dated October 2026, and it's signed off with love from your friendly neighborhood kernel tree 🎀🦋⭐ periodt.