v4l2_device...ll_until_err(9)

💖 NAME 💖

okay so this is v4l2_device...ll_until_err(9) from the Kernel API Manual, and it’s giving “group-chat organizer” energy: v4l2_device_mask_call_until_err calls the specified operation for all subdevices where a group ID matches a specified bitmask. no cap, that’s the whole point. 💅

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🫶 SYNOPSIS 🫶

v4l2_device_mask_call_until_err (v4l2_dev , grpmsk , o , f , args... );

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💅 ARGUMENTS 💅

• v4l2_dev — the struct v4l2_device that owns the sub-devices you’re iterating over.
• grpmsk — the bitmask checked against struct v4l2_subdev->grp_id, aka the group ID to be matched. use 0 to match them all.
• o — the name of the element at struct v4l2_subdev_ops that contains f. each element there groups a set of operations functions.
• f — the operation function that will be called if cond matches. operation functions are defined in groups, according to each element at struct v4l2_subdev_ops.
• args — arguments for f.

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🔥 DESCRIPTION 🔥

if the operation returns an error other than 0 or -ENOIOCTLCMD for any subdevice, then it aborts and returns with that error code. zero otherwise. periodt. ✨

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🚨 NOTE 🚨

🚨 bestie, listen: subdevs cannot be added or deleted while walking the subdevs list. that’s the rule. 💀

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👑 SEE ALSO 👑

the whole linked squad is: 🦋

• 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_disconnect(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_has_op(9)
• v4l2_device_mask_has_op(9)

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and that’s the tea 💅 this page comes from ./include/media, dated October 2026, with the footer tag v4l2_device...ll_until_err(9). bye bestie, go slay those subdevices 🫶✨