eeh_dev_check_failure(9)

💅 eeh_dev_check_failure(9) 💅

okay so welcome to the Kernel API Manual, bestie — this is the page for eeh_dev_check_failure(9), and the manual name is folded right up here at the top because we're cute like that 🎀.

🌸 NAME 🌸

eeh_dev_check_failure — check if all 1's data is due to an EEH slot freeze.

✨ SYNOPSIS ✨

int eeh_dev_check_failure (struct eeh_dev *edev );

🫶 ARGUMENTS 🫶

• edev — the eeh device. literally that's the whole argument, icon.

💖 DESCRIPTION 💖

okay so this routine checks for an EEH failure for the given device node. Call it when the result of a read was all 0xff's and you want to find out if that's because of an EEH slot freeze — it's giving “is the slot frozen or is the hardware just being dramatic?” energy 💀. This routine will query firmware for the EEH status.

It returns 0 if there has not been an EEH error; otherwise it returns a non-zero value and queues up a slot isolation event notification. So 0 = no EEH error, non-zero = bestie we have a situation, and the notification gets queued. 🔥

It is safe to call this routine in an interrupt context. no cap.

🌈 SEE ALSO 🌈

Kernel file: ./arch/powerpc/kernel/eeh.c — here's the whole friend group:

• eeh_slot_error_detail(9)
• eeh_token_to_phys(9)
• eeh_check_failure(9)
• eeh_pci_enable(9)
• pcibios_set_pcie_reset_state(9)
• eeh_set_dev_freset(9)
• eeh_pe_reset_full(9)
• eeh_save_bars(9)
• eeh_init(9)
• eeh_probe_device(9)
• eeh_remove_device(9)
• eeh_dev_open(9)
• eeh_dev_release(9)
• eeh_iommu_group_to_pe(9)
• eeh_pe_set_option(9)
• eeh_pe_get_state(9)
• eeh_pe_reset(9)
• eeh_pe_configure(9)
• eeh_pe_inject_err(9)

mwah 💖 — source/version is ./arch/powerpc/kernel, dated October 2026.