mv_err_intr(9)

💖 mv_err_intr — a love letter to error interrupts 💖

okay so bestie, we're in the mv_err_intr(9) girlies today 🎀 this one lives in the Kernel API Manual and it's all about handling error interrupts on the port. yes, that port. strap in ✨

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🌸 NAME 🌸

mv_err_intr — Handle error interrupts on the port 👑

like literally, that's the whole vibe: an error interrupt shows up, and this function deals with it. no cap.

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🦋 SYNOPSIS 🦋

void mv_err_intr (struct ata_port *ap );

that's it. that's the signature. void return, so it's not giving you anything back, it just does the thing 💅

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🎀 ARGUMENTS 🎀

• ap — the ATA channel to manipulate 🫶 that's your main character parameter right there, it's the port we're fussing over.

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💜 DESCRIPTION 💜

so most cases require a full reset of the chip's state machine, which also performs a COMRESET. like, we don't do half measures here, we go all the way 🔥 (and yes, the full reset of the state machine is what performs the COMRESET — both facts, same sentence, no skipping 💖)

also — and this is important — if the port disabled DMA, we update our cached copy to match. got it? update the cached copy. to match. 👑

LOCKING: Inherited from caller. 🧚 that's right, this function does not do its own locking, it inherits it from whoever called it. so whoever called it better have their locks together, fr fr.

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🌈 SEE ALSO 🌈

it's giving extended family. here's everyone in the Kernel file ./drivers/ata/sata_mv.c universe 🦋:

• mv_save_cached_regs(9)
• mv_write_cached_reg(9)
• mv_stop_edma_engine(9)
• mv_port_start(9)
• mv_port_stop(9)
• mv_fill_sg(9)
• mv_sff_irq_clear(9)
• mv_check_atapi_dma(9)
• mv_bmdma_setup(9)
• mv_bmdma_start(9)
• mv_bmdma_stop_ap(9)
• mv_bmdma_status(9)
• mv_qc_prep(9)
• mv_qc_prep_iie(9)
• mv_sff_check_status(9)
• mv_send_fis(9)
• mv_qc_issue_fis(9)
• mv_qc_issue(9)
• mv_host_intr(9)
• mv_interrupt(9)
• mv_port_init(9)
• mv_init_host(9)
• mv_platform_probe(9)
• mv_print_info(9)
• mv_pci_init_one(9)

all of them, bestie. every single one. iykyk 💀✨

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💀 reminder that this one's whole personality is resetting the chip's state machine and updating the cached copy when DMA got disabled — don't forget the second part, it's lowkey the sneaky important bit 🫶

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mwah 💋 this page was brought to you by ./drivers/ata, dated October 2026, and yes the page name is still mv_err_intr(9) — slay, go read the source, ily, bye 🎀✨💖