i2c_handle_s..._host_notify(9)

📦 version 7.3.1, in nixpkgs unstable

💅 i2c_handle_smbus_host_notify(9) — Kernel API Manual energy ✨

okay so bestie, we're in the Kernel API Manual today (yes, that manual, the one with all the (9) suffixes) and the star of the show is i2c_handle_smbus_host_notify. she's a helper, she's iconic, she forwards Host Notify events to the right I2C client, and she is genuinely so good at her job. let's get into it 🫶

✨ NAME ✨

i2c_handle_smbus_host_notify — forward a Host Notify event to the correct I2C client. like a lil matchmaker but for interrupts and devices 💌

🌸 SYNOPSIS 🌸

int i2c_handle_smbus_host_notify (struct i2c_adapter *adap , unsigned
short addr );

that's the whole signature, no cap. she takes two things and returns an int, periodt.

🎀 ARGUMENTS 🎀

  • adap — the adapter. the I2C adapter in question, the main character of the bus fr 💅
  • addr — the I2C address of the notifying device. that's who's doing the notifying, bestie 👑

🦋 CONTEXT 🦋

can't sleep. literally 😭 this is not a sleeper. do NOT try to sleep in here, she cannot and will not.

ngl this one matters: "can't sleep" means atomic context. act accordingly, no blocking, no napping, no "just a quick schedule while I wait" nonsense 🙈

⭐ DESCRIPTION ⭐

okay so here's the vibe: this is a helper function, right, and she's meant to be called from an I2C bus driver's interrupt handler. that's her whole origin story. you're in the IRQ handler, you hit this, and she will schedule the Host Notify IRQ. that's it, that's the gig, and she ate 🔥

so the flow is: interrupt handler calls her ➡️ she schedules the Host Notify IRQ ➡️ everything gets handled like the well-adjusted kernel citizen it is. slay.

🌈 SEE ALSO 🌈

the whole friend group, and by friend group I mean an absolutely enormous list of kernel functions, all of them living in the Kernel file ./drivers/i2c/i2c-core-base.c. go say hi 🫶

💖 cute lil sign-off 💖 this page came from the source path ./drivers/i2c, dated October 2026, and it's page i2c_handle_s..._host_notify(9) of the Kernel API Manual. go forth and forward those Host Notify events, bestie — you're literally built for this 🧚‍♀️✨
📦 where this page comes from