mpi3mr_eh_host_reset(9)

📦 version 7.3.1, in nixpkgs unstable

💅 mpi3mr_eh_host_reset — ok so boom, host reset time

Alright bestie, this one lives in the mpi3mr_eh_host_reset(9) corner of the Kernel API Manual and honestly? It's giving "the nuclear option, but make it a callback." Sit down, drink some water 🍓, and let's get into it.

🌸 NAME 🌸

mpi3mr_eh_host_reset — literally the Host reset error handling callback. That's the whole vibe: something went sideways, and this is the function the error handler calls to nuke the host controller back into line. No cap. 💥

✨ SYNOPSIS ✨

int mpi3mr_eh_host_reset (struct scsi_cmnd *scmd );

That's it, that's the whole signature. She takes one pointer and returns an int. Iconic and minimal 🎀

🫶 ARGUMENTS 🫶

  • scmd — the SCSI command reference. Yeah, that one. The struct scsi_cmnd * that's along for the ride so the error handler knows which command we were dealing with when everything went off the rails. 👑

🔥 DESCRIPTION 🔥

Issue controller reset.

That's the tea. The function's whole job — the entire reason she exists — is to issue a controller reset. Not a bus reset, not a target reset, not a dev reset (those have their own pages, go say hi to them later). We're resetting the controller. Big main character energy, absolutely no notes 💅

⭐ RETURN ⭐

  • SUCCESS — when the reset actually worked out. Slay. 💖
  • FAILED — when it did not. 😭

So like, check the return value, bestie. Don't just fire and forget and assume the reset ate. 🙈

🦋 SEE ALSO 🦋

First up, the kernel file this bad girl lives in — go read it, it's right here:

./drivers/scsi/mpi3mr/mpi3mr_os.c

And now the extended friend group 💜 — every single one of these, no skipping, we don't do that here:

Ok real talk — that's the whole friend list, iykyk. Every single one is (9), every single one is in the kernel API manual, and yes I made you scroll through all of them. You're welcome, bestie 🧚

That's the whole page, fr fr. Huge thank you to ./drivers/scsi/mpi3mr — dated October 2026 — for bringing us this absolute banger of a manpage. Go reset a controller, but like, responsibly 💜🌈

📦 where this page comes from