cdx_clear_master(9)

💖 cdx_clear_master(9) 💖

okay so bestie, welcome to the Kernel API Manual page for cdx_clear_master — yes that's the (9) section, we're in kernel-land now, put your hair up 🎀

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✨ NAME ✨

cdx_clear_master — disables bus-mastering for a CDX device 🚫🚌

like, it takes the bus-master hat off the device. no more bossing the bus around, bestie. that privilege is revoked 💅

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🌸 SYNOPSIS 🌸

int cdx_clear_master (struct cdx_device *cdx_dev );

that's the whole vibe. one function, one pointer, returns an int. iconic honestly 🫶

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🦋 ARGUMENTS 🦋

• cdx_dev — the CDX device to disable. yep, that's it. you hand it the device you want to un-master, and it does the thing. struct cdx_device *, non-negotiable ✨

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🎀 RETURN 🎀

• 0 — success!! it worked, slay 👑
• -errno — failure 😭 it went sideways and you get a negative errno back so you can figure out exactly how it went sideways. no cap, always check this one.

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🔥 SEE ALSO 🔥

sooo here's the whole friend group (kernel file ./include/linux/cdx/cdx_bus.h) 💜

• CDX_DEVICE(9)
• CDX_DEVICE_DRIVER_OVERRIDE(9)
• struct cdx_ops(9)
• struct cdx_controller(9)
• struct cdx_device(9)
• struct cdx_driver(9)
• __cdx_driver_register(9)
• cdx_driver_unregister(9)
• cdx_dev_reset(9)
• cdx_set_master(9)
• cdx_enable_msi(9)
• cdx_disable_msi(9)

also lowkey go read cdx_set_master(9) right after this one — they're giving complementary opposites, iykyk 🌈

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bestie note: this page lives in ./include/linux/cdx and it's dated October 2026 — so yeah, future vibes only ⭐💀

k that's the whole page, go clear that master flag, ily, bye 🧚💖🌸