mpiix_qc_issue(9)

💖 NAME 💖

okay bestie, this is mpiix_qc_issue(9) from the Kernel API Manual, and the name is literally mpiix_qc_issue — command issue. That’s it. That’s the whole name. Slay.

✨ SYNOPSIS ✨

unsigned int mpiix_qc_issue (struct ata_queued_cmd *qc );

🎀 ARGUMENTS 🎀

• qc — command pending. The manual is short and sweet here: it’s the pending command, full stop. The signature already tells you it’s a struct ata_queued_cmd *, so yeah. 🫶

🌸 DESCRIPTION 🌸

This function gets called when the libata layer is about to issue a command. We wrap this interface so that we can load the correct ATA timings if necessary — that’s the whole reason for the wrapper, no cap.

The logic also clears TIME0/TIME1 for the other device. Why? So that even if we get this wrong, cycles to the other device will be made PIO0. That’s literally the described safety behavior, and honestly? Iconic. 💅

🦋 SEE ALSO 🦋

• Kernel file ./drivers/ata/pata_mpiix.c
• mpiix_set_piomode(9)

That’s the page, bestie. It comes from ./drivers/ata, dated October 2026, and it’s mpiix_qc_issue(9) — bye, love you, mwah 💖✨🎀