pm_qos_enable_store(9)

💅 pm_qos_enable_store(9)

okay so bestie, this little icon is from the Kernel API Manual, and it's the sysfs side of the PM QoS enable switch. The whole page is giving “small function, big main-character energy” ✨.

🌸 NAME

pm_qos_enable_store — the sysfs handler to store value. That's it, that's the job 💖.

✨ SYNOPSIS

ssize_t pm_qos_enable_store (struct device *dev , struct
       device_attribute *attr , const char *buf , size_t count );

🎀 ARGUMENTS

• dev — the device associated with the UFS controller. Your fave device, basically 🫶.
• attr — the sysfs attribute handle. The little handle for the sysfs attribute vibe ✨.
• buf — the buffer for the sysfs file. It's where the characters live 🍓.
• count — the stores buffer characters count. Yep, the stores-buffer characters count 💅.

🦋 DESCRIPTION

Feed it 0 to disable PM QoS, and feed it 1 to enable. That's the whole mood.

Default state? 1. So it's enabled unless you say otherwise, periodt 👑.

🔥 RETURN

On success, you get the number of characters written to buf. On failure, it returns < 0 😭. No cap, that's the contract.

🌈 SEE ALSO

• Kernel file ./drivers/ufs/core/ufs-sysfs.c
• pm_qos_enable_show(9)

Signed off from ./drivers/ufs/core with the October 2026 timestamp energy, bestie — pm_qos_enable_store(9) out 💖✨