wmidev_invoke_method(9)

✨ wmidev_invoke_method 💅

okay so bestie, welcome to wmidev_invoke_method(9) from the Kernel API Manual — literally the glow-up your WMI driver has been waiting for 🫶

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🌸 NAME 🌸

wmidev_invoke_method — invoke a WMI method that returns values. yes that's the whole vibe, it calls the method AND hands you the receipts 💖

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🎀 SYNOPSIS 🎀

int wmidev_invoke_method (struct wmi_device *wdev , u8 instance , u32
method_id , const struct wmi_buffer *in , struct wmi_buffer *out ,
size_t min_size );

it's giving function signature realness, no cap ✨

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🦋 ARGUMENTS 🦋

• wdev — a wmi bus device from a driver. your main character device, if you will 👑
• instance — instance index. which one? this one 🔢
• method_id — method ID to call. the specific method bestie, be precise 💅
• in — mandatory WMI buffer containing input for the method call. mandatory means MANDATORY, don't skip it 🙈
• out — mandatory WMI buffer to return the method results. also mandatory, also not optional 🌸
• min_size — minimum size of the method result data in bytes. the floor, the bare minimum, the bar 📏

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🔥 DESCRIPTION 🔥

okay so here's the tea ☕ — this invokes a WMI method that returns values. the way that the caller must free the resulting data inside out using kfree — literally not optional, do it or leak 😭

said data is guaranteed to be aligned on an 8-byte boundary, which is honestly iconic and very much doing the most for you ✨

and hey, if you've got WMI methods that return no values? different function, bestie — use wmidev_invoke_procedure for that 💜

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⭐ RETURN ⭐

0 on success, or a negative error code on failure. that's it, that's the whole mood 🎀

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🌈 SEE ALSO 🌈

kernel file ./drivers/platform/wmi/core.c, plus the whole friend group:

• wmi_instance_count(9)
• wmidev_instance_count(9)
• wmi_evaluate_method(9)
• wmidev_evaluate_method(9)
• wmidev_invoke_procedure(9)
• wmi_query_block(9)
• wmidev_block_query(9)
• wmidev_query_block(9)
• wmi_set_block(9)
• wmidev_block_set(9)
• wmidev_set_block(9)
• wmi_install_notify_handler(9)
• wmi_remove_notify_handler(9)
• wmi_has_guid(9)
• wmi_get_acpi_device_uid(9)
• wmi_driver_unregister(9)

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💀 reminder: free out's data with kfree, and remember 8-byte alignment is guaranteed. no notes, just facts 🫶

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and that's the page babes 🌸 — brought to you by ./drivers/platform/wmi, dated **October 2026, catalogue number wmidev_invoke_method(9)`. mwah, go slay your method call 💅✨