dma_chan_put(9)

okay so bestie, we're doing dma_chan_put(9) from the Kernel API Manual and honestly? it's a tiny little function with big main-character energy 💅

✨ NAME ✨

dma_chan_put — drop a reference to a DMA channel's parent driver module

like, you're letting go of a ref, respectfully 🫶

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🌸 SYNOPSIS 🌸

void dma_chan_put (struct dma_chan *chan );

no cap, that's the whole signature ✨

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🎀 ARGUMENTS 🎀

• chan — the channel to release. that's your girl to let go of 💖

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💜 DESCRIPTION 💜

okay so this is the important part, bestie: Must be called under dma_list_mutex.

like, not optional. not "eh, maybe later." you gotta be holding dma_list_mutex when you call this. periodt. 🔥

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🦋 SEE ALSO 🦋

• Kernel file ./drivers/dma/dmaengine.c
• dev_to_dma_chan(9)
• struct dma_chan_tbl_ent(9)
• dma_chan_is_local(9)
• min_chan(9)
• dma_channel_rebalance(9)
• balance_ref_count(9)
• dma_chan_get(9)
• dma_find_channel(9)
• dma_issue_pending_all(9)
• dma_get_slave_channel(9)
• __dma_request_channel(9)
• dma_request_chan(9)
• dma_request_chan_by_mask(9)
• devm_dma_request_chan(9)
• dmaengine_get(9)
• dmaengine_put(9)
• dma_async_device_register(9)
• dma_async_device_unregister(9)
• dmaenginem_async_device_register(9)
• dma_wait_for_async_tx(9)
• dma_run_dependencies(9)

go read those if you want the full lore, iykyk 📚✨

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and that's the whole vibe check, bestie 💖 this cutie lives over in ./drivers/dma, dated October 2026, and it's literally called dma_chan_put(9) — slay, goodbye, don't forget your dma_list_mutex 🌈💅