rio_unlock_device(9)

💅 rio_unlock_device(9) — the Kernel API Manual glow-up ✨

okay so bestie, we're in the Kernel API Manual today and the star of the show is rio_unlock_device(9). it's the unlock half of the lock/unlock duo, and honestly? she's giving "I just freed the device, you're welcome" energy. 🎀

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🌸 NAME 🌸

rio_unlock_device — releases the host device lock for a specified device. that's it, that's the whole job, and she does it with grace 💅

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🦋 SYNOPSIS 🦋

int rio_unlock_device (struct rio_mport *port , u16 destid , u8 hopcount
);

like, three args, one int back. no cap, it's that simple ✨

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🎀 ARGUMENTS 🎀

• port — the master port that's gonna send the transaction 🫶
• destid — the Destination ID for the device/switch you're unlocking, iykyk
• hopcount — the hopcount it takes to reach the switch 🧚

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💖 DESCRIPTION 💖

here's the tea: it returns 0 if the device lock got released, or EINVAL if it fails. that's literally the whole vibe check 😭 no extra lore, no secret side quests — success or EINVAL, pick your fighter 🔥

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🌈 SEE ALSO 🌈

the whole rapidio squad, assembled, and yes they're all (9) pages because we roll with the kernel crowd 👑

the kernel file lives at ./drivers/rapidio/rio.c and it's also hanging out with:

• rio_local_get_device_id(9)
• rio_query_mport(9)
• rio_alloc_net(9)
• rio_local_set_device_id(9)
• rio_add_device(9)
• rio_request_inb_mbox(9)
• rio_release_inb_mbox(9)
• rio_request_outb_mbox(9)
• rio_release_outb_mbox(9)
• rio_setup_inb_dbell(9)
• rio_request_inb_dbell(9)
• rio_release_inb_dbell(9)
• rio_request_outb_dbell(9)
• rio_release_outb_dbell(9)
• rio_add_mport_pw_handler(9)
• rio_del_mport_pw_handler(9)
• rio_request_inb_pwrite(9)
• rio_release_inb_pwrite(9)
• rio_pw_enable(9)
• rio_map_inb_region(9)
• rio_unmap_inb_region(9)
• rio_map_outb_region(9)
• rio_unmap_outb_region(9)
• rio_mport_get_physefb(9)
• rio_get_comptag(9)
• rio_set_port_lockout(9)
• rio_enable_rx_tx_port(9)
• rio_chk_dev_route(9)
• rio_mport_chk_dev_access(9)
• rio_chk_dev_access(9)
• rio_get_input_status(9)
• rio_clr_err_stopped(9)
• rio_inb_pwrite_handler(9)
• rio_mport_get_efb(9)
• rio_mport_get_feature(9)
• rio_std_route_add_entry(9)
• rio_std_route_get_entry(9)
• rio_std_route_clr_table(9)
• rio_lock_device(9)
• rio_route_add_entry(9)
• rio_route_get_entry(9)
• rio_route_clr_table(9)
• rio_request_mport_dma(9)
• rio_release_dma(9)
• rio_dma_prep_xfer(9)
• rio_register_scan(9)
• rio_mport_scan(9)

(and yes, rio_lock_device(9) is right there in the list — she's the twin, they come as a set 💜)

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ngl if you're ever lost, just remember: lock it before you unlock it. main character behaviour only 🔥

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and that's the page! shipped from ./drivers/rapidio, dated October 2026 — mwah, go unlock something iconic bestie 💋✨💖