dma_wait_for_async_tx(9)

✨ dma_wait_for_async_tx ✨

okay so bestie, welcome to the Kernel API Manual for dma_wait_for_async_tx 💅 this one is a little function with a big job and honestly? she's giving "i will stand here and stare at this transaction until it's done" energy 🫶

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🌸 NAME 🌸

dma_wait_for_async_tx — spin wait for a transaction to complete 🌀

like, literally spin. in a loop. until the transaction is done. no cap 💀

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🎀 SYNOPSIS 🎀

enum dma_status dma_wait_for_async_tx (struct dma_async_tx_descriptor
*tx );

that's the whole signature, bestie — she returns an enum dma_status, and she takes exactly one argument, which is that struct dma_async_tx_descriptor *tx pointer right there ✨

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🦋 ARGUMENTS 🦋

• tx — the in-flight transaction you want to wait on. yes, the one that's literally mid-flight. you're gonna sit here and wait for it to land, and that's the whole vibe 🛬

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💜 SEE ALSO 💜

okay this list is LONG and it's giving "the whole dmaengine friend group showed up to the party" so let's give everyone their moment 🌈

first up, the kernel file:

• Kernel file ./drivers/dma/dmaengine.c

then the whole squad, in order, no one gets left out 👑:

• 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_chan_put(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_run_dependencies(9)

like i said. whole friend group. iconic behavior, honestly 💅✨

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🧚 a lil sign-off 🧚

this page lives under ./drivers/dma, and the version/date stamp on it is October 2026 — so yeah, she's from the future-ish and she's thriving 💖

that's the whole page, bestie — go wait on that transaction, and slay 🎀🔥