v4l2_device_disconnect(9)

💅 v4l2_device_disconnect(9) 💅

okay so this is Kernel API Manual content, section 9, and we're talking about the function that changes a V4L2 device's state to disconnected. it's giving "breakup era" but for kernel devices ✨

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🌸 NAME 🌸

v4l2_device_disconnect — changes a V4L2 device's state to disconnected. literally that's the job, and it does it 💅

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🦋 SYNOPSIS 🦋

the signature is exactly this, no cap:

void v4l2_device_disconnect (struct v4l2_device *v4l2_dev );

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🎀 ARGUMENTS 🎀

• v4l2_dev — pointer to struct v4l2_device. that's the device bestie we're disconnecting 🫶

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✨ DESCRIPTION ✨

should be called when the USB parent disconnects. since the parent disappears, this ensures that v4l2_dev doesn't have an invalid parent pointer. very "clean up your contacts after the situationship ends" of it, honestly 😭

🚨 note: this function sets v4l2_dev->dev to NULL.

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🌈 SEE ALSO 🌈

peep the kernel file ./include/media/v4l2-device.h and struct v4l2_device(9), then the whole squad:

• Kernel file: ./include/media/v4l2-device.h
• struct v4l2_device(9)
• v4l2_device_get(9)
• v4l2_device_put(9)
• v4l2_device_register(9)
• v4l2_device_set_name(9)
• v4l2_device_unregister(9)
• v4l2_device_register_subdev(9)
• v4l2_device_unregister_subdev(9)
• __v4l2_device_register_subdev_nodes(9)
• v4l2_device_register_subdev_nodes(9)
• v4l2_device_register_ro_subdev_nodes(9)
• v4l2_subdev_notify(9)
• v4l2_device_supports_requests(9)
• v4l2_device_for_each_subdev(9)
• __v4l2_device_call_subdevs_p(9)
• __v4l2_device_call_subdevs(9)
• __v4l2_device_call_subdevs_until_err_p(9)
• __v4l2_device_call_subdevs_until_err(9)
• v4l2_device_call_all(9)
• v4l2_device_call_until_err(9)
• v4l2_device_mask_call_all(9)
• v4l2_device_mask_call_until_err(9)
• v4l2_device_has_op(9)
• v4l2_device_mask_has_op(9)

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mwah 💋 that's the page, bestie. source/version: ./include/media; date: October 2026; page: v4l2_device_disconnect(9). slay and stay safe in kernel land 🧚💜