sci_mpc_agent_link_down(9)

📦 version 7.3.1, in nixpkgs unstable

okay so real talk, this is a page straight out of the Kernel API Manual for sci_mpc_agent_link_down(9), and yes the NAME section is literally just the function name with a lonely little dash and nothing after it. iconic minimalism, honestly. 🎀

✨ NAME ✨

sci_mpc_agent_link_down — (that's it. that's the description. the original gives us a dash and dips. 💀)

🌸 SYNOPSIS 🌸

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

no return value, it's giving void and unbothered. ✨

🦋 ARGUMENTS 🦋

  • ihost — the controller object that's catching the link down notification. like, this is the main character receiving the news.
  • port_agent — the port configuration agent for the controller. it's the one handling the situation.
  • iport — the port object that goes with the phy. lowkey important: if there's no associated port, this is an NULL. and heads up — the port is an invalid handle only if the phy was never part of this port. that happens when the phy isn't broadcasting the same SAS address as the other phys in the assigned port. ngl, sketchy vibes. 🙈
  • iphy — the phy object that has gone link down. poor thing. 😭

💖 DESCRIPTION 💖

so what does this actually do? it handles the manual port configuration link down notifications. since every port and phy gets associated at initialization time, we just turn right around and notify the port object about the link down event. no detective work needed, fr fr.

and if this PHY isn't associated with a port? no action taken. zero. nada. we move on. 🫶

now here's the fun little question the page literally poses: is it possible to get a link down notification from a phy that has no assocoated port? (yes, that typo is canon, we keep it, it's part of the lore 💅). anyway, that's the question hanging in the air. mysterious. main character energy.

🔥 SEE ALSO 🔥

go read those too, bestie, they're all in the same friend group. 🌈

okay that's the whole page, no cap. 💜 this little gem lives in ./drivers/scsi/isci and the version stamp on it is October 2026 — so yeah, mark your calendar, the future is calling. mwah, slay, periodt. 👑✨

📦 where this page comes from