usb_register_device_driver(9)

💖 usb_register_device_driver — Kernel API Manual 💖

okay so bestie, you're in the usb_register_device_driver(9) girlie-pop corner of the Kernel API Manual and honestly? this one is a bop. it's short, it's sweet, it's giving "three lines of code, infinite consequences." let's get into it 🎀

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✨ NAME ✨

usb_register_device_driver — register a USB device (not interface) driver

like, the whole entire point: it's for a device driver, not an interface driver. do not confuse the two, i'm begging 🙏

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🌸 SYNOPSIS 🌸

int usb_register_device_driver (struct usb_device_driver *new_udriver , struct module *owner );

she takes two args and hands you back an int. simple. iconic. no notes 💅

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🦋 ARGUMENTS 🦋

• new_udriver — the USB operations for the device driver. this is literally your driver's whole personality, the ops struct she's gonna live in ✨
• owner — the module owner of this driver. yes, that's the module you belong to. yes, you pass it. no, you don't skip it 🙈

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👑 DESCRIPTION 👑

so what does she actually do? she registers a USB device driver with the USB core. that's it, that's the function. 🫶

and here's the cute part — the list of unattached devices gets rescanned every time a new driver is added 😭 so your freshly-registered driver gets a shot at attaching to any of the recognized devices that are just vibing there, unclaimed. it's giving "new girl walks into the group chat and immediately finds her people."

key detail bestie: a new driver is added → rescan happens → new driver can attach to any recognized devices. no polling from you, the core handles it. periodt. 🔥

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⭐ RETURN ⭐

• negative error code on failure 😭 (something went wrong, check it, don't ignore it)
• 0 on success ✨ (slay, you're registered)

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💜 SEE ALSO 💜

listen. this list is LONG. i'm not gatekeeping a single one of them, so here's the whole squad, in the original order, no cap:

• Kernel file ./drivers/usb/core/driver.c
• usb_driver_claim_interface(9)
• usb_driver_release_interface(9)
• usb_match_id(9)
• usb_deregister_device_driver(9)
• usb_register_driver(9)
• usb_deregister(9)
• usb_suspend_both(9)
• usb_resume_both(9)
• usb_enable_autosuspend(9)
• usb_disable_autosuspend(9)
• usb_autosuspend_device(9)
• usb_autoresume_device(9)
• usb_autopm_put_interface(9)
• usb_autopm_put_interface_async(9)
• usb_autopm_put_interface_no_suspend(9)
• usb_autopm_get_interface(9)
• usb_autopm_get_interface_async(9)
• usb_autopm_get_interface_no_resume(9)

iykyk 🧚 that autopm section alone is a whole semester.

ok real talk: register it and forget the return value at your own risk — a negative error code means she did not register, and your driver is out here main-character-ing with no actual presence in the core 💀 check your ints bestie.

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and that's the whole page, no crumbs left 🌈 mwah 💋 this came to you from the source <pink>./drivers/usb/core</pink>, dated October 2026, and the manual page is usb_register_device_driver(9) — go forth and register responsibly, my love 🍓💜