scu_link_la...tocol_engine(9)

💅 scu_link_layer_stop_protocol_engine — NAME

ok so bestie, gather round: scu_link_layer_stop_protocol_engine ✨ (that's the whole name, the dash at the end is just the manpage being dramatic and mysterious 🎀). It lives in the Kernel API Manual, section 9, and honestly? she's a niche little icon.

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✨ SYNOPSIS ✨

void scu_link_layer_stop_protocol_engine (struct isci_phy *iphy );

that's it. that's the whole signature. no return value, no cap. 🫶

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🦋 ARGUMENTS 🦋

• iphy — this is the struct isci_phy object to stop. like, the actual phy. the one you're putting on pause. 💅

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🔥 DESCRIPTION 🔥

okay so this method will stop the struct isci_phy object. periodt. 🎀

but here's the part where you need to pay attention, bestie, because it's giving "read the fine print" energy: this does not reset the protocol engine. not even a little. what it does do is suspend it — it just places the protocol engine in a state where it will not cause the end device to power up. lowkey a very chill, non-violent kind of stopping. 😭

and then the manpage just says: none. 💀 that's it. no extra notes, no caveats, nothing. iconic minimalism honestly.

ngl the distinction matters: suspend ≠ reset. don't go thinking you nuked the protocol engine, because you did not, bestie. 🙈

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/scsi/isci/phy.c
• phy_get_non_dummy_port(9)
• sci_phy_setup_transport(9)
• sci_phy_complete_link_training(9)
• scu_link_layer_tx_hard_reset(9)
• isci_phy_control(9)

go read those too, iykyk 🧚💜

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and that's the whole vibe check! this little gem lives under ./drivers/scsi/isci, straight out of October 2026 — so yeah, she's recent, she's specific, and she's lowkey obsessed with not resetting the protocol engine. slay. ⭐💖