sata_down_spd_limit(9)

💖 NAME 💖

hiii bestie 💖 welcome to sata_down_spd_limit(9) — yes, that's the page, and the Kernel API Manual is the manual it lives in. This whole function is here to adjust SATA spd limit downward. Very demure, very mindful, very speed-cap. ✨

✨ SYNOPSIS ✨

int sata_down_spd_limit (struct ata_link *link , u32 spd_limit );

🎀 ARGUMENTS 🎀

• link — the link to adjust the SATA spd limit for. Like, this is the one getting the speed-limit glow-down. 🦋
• spd_limit — the additional limit. Extra cap energy, no cap. 🧢

🦋 DESCRIPTION 🦋

Okay so this function adjusts the SATA spd limit of link downward. Important note, bestie: this function only adjusts the limit. The change must be applied using sata_set_spd. Do not skip that part, or the limit is just sitting there looking cute and doing absolutely nothing. 💅

If spd_limit is non-zero, the speed is limited to equal to or lower than spd_limit if such speed is supported. If spd_limit is slower than any supported speed, only the lowest supported speed is allowed. That's the rule. Periodt. 🌸

LOCKING: Inherited from caller. Like, whoever called this function brings the locking vibe — it is not being invented here. 🔒

💜 RETURN 💜

• 0 on success ✨
• negative errno on failure 😭

👑 SEE ALSO 👑

Kernel file ./drivers/ata/libata-sata.c and the whole friend group:

• sata_scr_valid(9)
• sata_scr_read(9)
• sata_scr_write(9)
• sata_scr_write_flush(9)
• ata_tf_to_fis(9)
• ata_tf_from_fis(9)
• sata_link_debounce(9)
• sata_link_resume(9)
• sata_link_scr_lpm(9)
• sata_set_spd_needed(9)
• sata_set_spd(9)
• sata_link_hardreset(9)
• sata_std_hardreset(9)
• ata_qc_complete_multiple(9)
• ata_slave_link_init(9)
• sata_lpm_ignore_phy_events(9)
• ata_ncq_prio_supported(9)
• ata_ncq_prio_enabled(9)
• ata_ncq_prio_enable(9)
• ata_change_queue_depth(9)
• ata_scsi_change_queue_depth(9)
• ata_sas_sdev_configure(9)
• ata_sas_queuecmd(9)
• sata_async_notification(9)
• ata_eh_read_log_10h(9)
• ata_eh_get_ncq_success_sense(9)
• ata_eh_analyze_ncq_error(9)

okay that's the page 💅 cute little sign-off: this one's from ./drivers/ata, dated October 2026, and the footer name is literally sata_down_spd_limit(9) — mwah, slay, bye 🫶