sci_apc_agent_link_down(9)

💅 sci_apc_agent_link_down(9) — like, the link-down handler, from your Kernel API Manual bestie

okay so bestie, welcome to sci_apc_agent_link_down, page 9 of the Kernel API Manual, and yes the title is literally just the function name because the NAME section said so and we don't argue with the NAME section.

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✨ NAME ✨

sci_apc_agent_link_down — and that's the whole NAME line, no cap, the original left the description blank so I'm leaving it blank too 🫶

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🎀 SYNOPSIS 🎀

void sci_apc_agent_link_down (struct isci_host *ihost , struct
sci_port_configuration_agent *port_agent , struct isci_port *iport ,
struct isci_phy *iphy );

returns void, takes four args, that's the whole vibe 🔥

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🌸 ARGUMENTS 🌸

• ihost — the controller object that catches the link down notification. this is the main character of the story 💖
• port_agent — the port configuration agent for that controller. the one doing the actual work ngl
• iport — the port object hanging out with the phy. and listen: if there is no associated port, this thing is NULL. literally NULL. keep that in mind 👀
• iphy — the phy object that's gone link down. the reason we're all here 😭

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🦋 DESCRIPTION 🦋

so this method handles the automatic port configuration link down notifications. that's the whole job description.

if the phy isn't associated with a port? no action taken. nothing happens. we simply do not move 💅

and then the original just... asks a question, and honestly? mood. here it is verbatim:

Is it possible to get a link down notification from a phy that has no assocoated port?

an open question, bestie. it's giving philosophical. iykyk 🙈

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⭐ SEE ALSO ⭐

kernel file ./drivers/scsi/isci/port_config.c

• sci_sas_address_compare(9)
• sci_port_configuration_agent_find_port(9)
• sci_port_configuration_agent_validate_ports(9)
• sci_mpc_agent_link_down(9)
• sci_apc_agent_link_up(9)

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k that's the page!! sign-off time: this one lives in ./drivers/scsi/isci, it's dated October 2026, and it's page sci_apc_agent_link_down(9) of the Kernel API Manual — go read the SEE ALSO list, it ate 🍓👑✨