qla8044_lock_recovery(9)

📦 version 7.3.1, in nixpkgs unstable

💅 qla8044_lock_recovery — the manual page, but make it iconic

okay so bestie, you found the qla8044_lock_recovery(9) page in the Kernel API Manual and I'm literally about to make it make sense. this one's all about recovering a lock, and it's giving "small function, big drama." let's get into it 🫶

✨ NAME ✨

qla8044_lock_recovery — recovers the idc_lock. that's it. that's the whole gig. she's a lock recovery icon and she knows it 💅

🌸 SYNOPSIS 🌸

int qla8044_lock_recovery (struct scsi_qla_host *vha );

like, she takes one argument and returns an int. no cap, that's the whole signature.

🎀 ARGUMENTS 🎀

  • vha — pointer to the adapter structure. that's your girl. you hand her the adapter and she does her thing ✨

🔥 DESCRIPTION 🔥

okay so this is where it gets juicy. we're talking about the Lock Recovery Register and honestly it's giving "I have a very specific job and I will do it." the tea is:

Lock Recovery Register 5-2 — the lock recovery owner is the Function ID of whichever driver is doing the lock recovery, and it's valid if bits 1..0 are set by the driver doing lock recovery. noted. 📝

then there's this bit situation:

  • 1-0: 1 means the driver intends to force unlock the IDC lock. 2 means the driver is moving forward to unlock the IDC lock. and bestie, the driver clears this field after force unlocking the IDC lock. clean up after yourself, periodt 💅

🌈 the lock recovery process (a.k.a. the five-step slay) 🌈

a. Read the IDC_LOCK_RECOVERY register. if the value in bits 1..0 is greater than 0, then wait for the other driver to unlock — otherwise, move to the next step. lowkey polite of us. 🙈

b. Indicate intent to force-unlock by writing 1h to the IDC_LOCK_RECOVERY register bits 1..0, and also set the function# in bits 5..2. manifesting that unlock energy ✨

c. Read the IDC_LOCK_RECOVERY register again after a delay of 200ms. wait for the other driver to perform lock recovery if the function number in bits 5..2 has changed — otherwise, move to the next step. she's patient but she's not waiting forever, iykyk ⏳

d. Write a value of 2h to the IDC_LOCK_RECOVERY register bits 1..0, leaving your function# in bits 5..2. we're moving forward, bestie 🦋

e. Force unlock using the DRIVER_UNLOCK register and immediately clear the IDC_LOCK_RECOVERY bits 5..0 by writing 0. no lingering, no crumbs, we clean up 💀✨

👑 SEE ALSO 👑

like, go read the actual kernel file if you want the full lore:

Kernel file ./drivers/scsi/qla2xxx/qla_nx2.c

and these iconic siblings of hers:

they're all in ./drivers/scsi/qla2xxx and honestly? a whole squad. go say hi 🫶

bestie note: this page is from October 2026, source is ./drivers/scsi/qla2xxx, and it's out here living its best life in the Kernel API Manual. now you know. periodt. 💖✨🎀🦋🌸💅🫶😭🔥👑🌈⭐💀🙈🍓🧚💜
📦 where this page comes from