acpi_dma_controller_free(9)

hiii bestie 💖 welcome to the Kernel API Manual — today’s main character is acpi_dma_controller_free(9), and she’s here to remove a DMA controller from the ACPI DMA helpers list. clean, useful, iconic. ✨

🎀 NAME 🎀

acpi_dma_controller_free — remove a DMA controller from the ACPI DMA helpers list. no cap, that’s the whole assignment. 💅

✨ SYNOPSIS ✨

int acpi_dma_controller_free (struct device *dev );

like yes, that’s the signature, and it hands you back an int. 🫶

🌸 ARGUMENTS 🌸

• dev — the struct device of the DMA controller. that’s the one you’re passing in, bestie. 🎀

💫 DESCRIPTION 💫

okay so the lore is short and sweet: memory allocated by acpi_dma_controller_register is freed here. that’s it. that’s the whole vibe. 🦋

🔥 RETURN 🔥

• 0 on success or appropriate errno value on error. 💅

🦋 SEE ALSO 🦋

the besties and lore drops are all here, iykyk:

• Kernel file ./drivers/dma/acpi-dma.c
• acpi_dma_parse_resource_group(9)
• acpi_dma_parse_csrt(9)
• acpi_dma_controller_register(9)
• devm_acpi_dma_controller_register(9)
• acpi_dma_update_dma_spec(9)
• acpi_dma_parse_fixed_dma(9)
• acpi_dma_request_slave_chan_by_index(9)
• acpi_dma_request_slave_chan_by_name(9)
• acpi_dma_simple_xlate(9)

byeee bestie 🫶 source/version: ./drivers/dma · date: October 2026 — mwah 💋