__msi_lock_descs(9)

💖 __msi_lock_descs(9) 💖

okay bestie, welcome to the Kernel API Manual page for __msi_lock_descs(9) — yes, the manual name is folded right in here because we're doing this properly. ✨

🌸 NAME 🌸

__msi_lock_descs — Lock the MSI descriptor storage of a device. Like, it locks the MSI descriptor storage for a device, no cap. 🔒

🫶 SYNOPSIS 🫶

void __msi_lock_descs (struct device *dev );

🎀 ARGUMENTS 🎀

• dev — Device to operate on. The device we're operating on, fr fr. 🫶

💅 DESCRIPTION 💅

So this one is an internal function for guard(msi_descs_lock). That's the whole description, bestie — it's giving internal-only energy.

🚨 bestie, don't use it in code. The manpage literally says Don't use in code, and we are not fighting the manpage on this. 💀

👑 SEE ALSO 👑

Kernel file: ./kernel/irq/msi.c. Also, go check out these iconic references:

• struct msi_device_data(9)
• struct msi_ctrl(9)
• msi_alloc_desc(9)
• msi_domain_insert_msi_desc(9)
• msi_domain_free_msi_descs_range(9)
• msi_domain_add_simple_msi_descs(9)
• msi_setup_device_data(9)
• __msi_unlock_descs(9)
• msi_domain_first_desc(9)
• msi_next_desc(9)
• msi_domain_get_virq(9)
• msi_device_populate_sysfs(9)
• msi_device_destroy_sysfs(9)
• msi_domain_set_affinity(9)
• msi_create_irq_domain(9)
• msi_create_parent_irq_domain(9)
• msi_parent_init_dev_msi_info(9)
• msi_create_device_irq_domain(9)
• msi_remove_device_irq_domain(9)
• msi_match_device_irq_domain(9)
• msi_domain_alloc_irqs_range_locked(9)
• msi_domain_alloc_irqs_range(9)
• msi_domain_alloc_irqs_all_locked(9)
• msi_domain_alloc_irq_at(9)
• msi_device_domain_alloc_wired(9)
• msi_domain_free_irqs_range_locked(9)
• msi_domain_free_irqs_range(9)
• msi_domain_free_irqs_all_locked(9)
• msi_domain_free_irqs_all(9)
• msi_device_domain_free_wired(9)
• msi_get_domain_info(9)
• msi_device_has_isolated_msi(9)

that's the page, bestie 🫶 source/version: ./kernel/irq · date: October 2026 · now go off and lock those descriptors (but not from your own code, remember?) 💅✨