ep93xx_dma_f...an_resources(9)

💖 ep93xx_dma_free_chan_resources(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ — yes, that's the manual name, we're being fancy today. This page is literally titled ep93xx_dma_f...an_resources(9) (the title got cut off mid-word by the formatting gremlins, no cap, that's just how it printed) and it's about letting go of channel resources. Cleanup era. We love a healthy release cycle 🧚

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🌸 NAME 🌸

ep93xx_dma_free_chan_resources — release resources for the channel 🫶

Like, it's the breakup function. It gives back everything the channel borrowed.

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✨ SYNOPSIS ✨

void ep93xx_dma_free_chan_resources (struct dma_chan *chan );

That's it. That's the whole signature. void return, so it gives you nothing back except closure 💅

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🎀 ARGUMENTS 🎀

• chan — channel 🌈 (yes, that's the entire description the original gives us, and honestly? iconic minimalism)

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🦋 DESCRIPTION 🦋

So this function releases all the resources allocated for the given channel. All of them. Every last one. It's giving spring cleaning, it's giving moving out and taking your plants with you 🌱

⚠️ big heads-up bestie: the channel must be idle when this is called. Idle. Not "almost done", not "one tiny transfer left", idle. Do the vibe check first, fr fr, because this is not a suggestion — it's a requirement stated right there in black and white.

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👑 SEE ALSO 👑

Kernel file ./drivers/dma/ep93xx_dma.c — go read the source, it's right there, iykyk 📖

• struct ep93xx_dma_desc(9)
• struct ep93xx_dma_chan(9)
• struct ep93xx_dma_engine(9)
• ep93xx_dma_set_active(9)
• ep93xx_dma_advance_active(9)
• ep93xx_dma_advance_work(9)
• ep93xx_dma_tx_submit(9)
• ep93xx_dma_alloc_chan_resources(9)
• ep93xx_dma_prep_dma_memcpy(9)
• ep93xx_dma_prep_slave_sg(9)
• ep93xx_dma_prep_dma_cyclic(9)
• ep93xx_dma_synchronize(9)
• ep93xx_dma_terminate_all(9)
• ep93xx_dma_tx_status(9)
• ep93xx_dma_issue_pending(9)

That's the whole friend group 💜 (ep93xx_dma_alloc_chan_resources(9) is literally the opposite twin, they're obsessed with each other.)

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🍓 oh and if you're wondering "is there a return value?" — no. void. Nothing. Nada. It just does the thing and dips 🙈

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sign-off szn 🎀 this gem lives in the kernel source tree at ./drivers/dma, dated October 2026, and the manual page itself is ep93xx_dma_f...an_resources(9) — yes, same truncated name, we're consistent. mwah, go free those channel resources responsibly, ily, bye 💅✨