mv_sff_check_status(9)

💅 mv_sff_check_status — a Kernel API Manual moment 💅

ok so bestie, welcome to the mv_sff_check_status(9) era, it's giving kernel-internals slay and honestly? iconic. this lil function lives in the kernel API manual and it's here to grab device status — but only if it's valid, iykyk 🎀

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🌸 NAME 🌸

mv_sff_check_status — fetch device status, if valid ✨ (yes that's the whole vibe, she's a one-liner)

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🦋 SYNOPSIS 🦋

u8 mv_sff_check_status (struct ata_port *ap );

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💖 ARGUMENTS 💖

• ap — literally the ATA port we're fetching status from, that's it, that's the whole argument, no cap 🫶

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🔥 DESCRIPTION 🔥

okay so here's the tea ☕ — when you're using command issue via mv_qc_issue_fis, the initial ATA_BUSY state does not show up in the ATA status (shadow) register. and like… this can confuse libata! 😭 genuinely, poor thing's just out there being confused.

so bestie, we have a hook right here to fake ATA_BUSY for that exact situation, until the first time a BUSY, DRQ, or ERR bit is seen. it's like method acting but for hardware registers 💅

the rest of the time? she just simply returns the ATA status register. lowkey simple, highkey essential, periodt 👑

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⭐ SEE ALSO ⭐

Kernel file ./drivers/ata/sata_mv.c, plus the whole friend group (it's a big friend group, we love that for them):

• 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_send_fis(9)
• mv_qc_issue_fis(9)
• mv_qc_issue(9)
• mv_err_intr(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)

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and that's the page, bestie!! 🧚 this came out of ./drivers/ata and she's dated October 2026 — mwah, go read the whole friend group, fr fr 💜✨