xilinx_dpdma...it_no_ostand(9)

💅 xilinx_dpdma_chan_wait_no_ostand — the Kernel API Manual page, bestie edition 🎀

okay so this is from the Kernel API Manual, and today's main character is xilinx_dpdma_chan_wait_no_ostand. yes it's a long name. no we're not scared of it. let's go ✨

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🌸 NAME 🌸

xilinx_dpdma_chan_wait_no_ostand — literally just sitting there and waiting for the no outstanding irq. that's the whole job. she waits. 🫶

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✨ SYNOPSIS ✨

int xilinx_dpdma_chan_wait_no_ostand (struct xilinx_dpdma_chan *chan );

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💖 ARGUMENTS 💖

• chan — the DPDMA channel. that's it, that's the whole argument. one (1) channel, no notes 💅

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🦋 DESCRIPTION 🦋

so what she does is wait for the no outstanding transaction interrupt. lowkey a vibe, highkey important.

and here's the tea: this function can sleep for 50ms. so like… don't call her from somewhere she's not allowed to nap, iykyk. 😴

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🔥 RETURN 🔥

• 0 on success — slay, we're done, everything's chill ✨
• -ETIMEOUT on failure — for time out. she waited, nobody came, it's giving ghosted 😭
• or the error code from wait_event_interruptible_timeout — whatever that hands back, she passes it straight to you. no filter, fr fr

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🌈 SEE ALSO 🌈

the whole friend group, in order, no one left out 👑

• the kernel file ./drivers/dma/xilinx/xilinx_dpdma.c
• struct xilinx_dpdma_hw_desc(9)
• struct xilinx_dpdma_sw_desc(9)
• struct xilinx_dpdma_tx_desc(9)
• struct xilinx_dpdma_chan(9)
• struct xilinx_dpdma_device(9)
• xilinx_dpdma_sw_desc_set_dma_addrs(9)
• xilinx_dpdma_chan_alloc_sw_desc(9)
• xilinx_dpdma_chan_free_sw_desc(9)
• xilinx_dpdma_chan_dump_tx_desc(9)
• xilinx_dpdma_chan_alloc_tx_desc(9)
• xilinx_dpdma_chan_free_tx_desc(9)
• xilinx_dpdma_chan_prep_cyclic(9)
• xilinx_dpdma_chan_prep_interleaved_dma(9)
• xilinx_dpdma_chan_enable(9)
• xilinx_dpdma_chan_disable(9)
• xilinx_dpdma_chan_pause(9)
• xilinx_dpdma_chan_unpause(9)
• xilinx_dpdma_chan_queue_transfer(9)
• xilinx_dpdma_chan_ostand(9)
• xilinx_dpdma_chan_notify_no_ostand(9)
• xilinx_dpdma_chan_poll_no_ostand(9)
• xilinx_dpdma_chan_stop(9)
• xilinx_dpdma_chan_done_irq(9)
• xilinx_dpdma_chan_vsync_irq(9)
• xilinx_dpdma_chan_err(9)
• xilinx_dpdma_chan_handle_err(9)
• xilinx_dpdma_alloc_chan_resources(9)
• xilinx_dpdma_free_chan_resources(9)
• xilinx_dpdma_terminate_all(9)
• xilinx_dpdma_synchronize(9)
• xilinx_dpdma_err(9)
• xilinx_dpdma_handle_err_irq(9)
• xilinx_dpdma_enable_irq(9)
• xilinx_dpdma_disable_irq(9)
• xilinx_dpdma_chan_err_task(9)

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ngl bestie, if you only remember one thing: she waits, she can sleep for 50ms, and she will absolutely hand you -ETIMEOUT if the interrupt never shows. periodt. 💀

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mwah, that's the page 🫶 this little number lives in ./drivers/dma/xilinx, and it's stamped October 2026 — so go forth, call your channels, and remember who told you 💜