pci_aer_unma...ernal_errors(9)

💅 pci_aer_unmask_internal_errors(9) — a whole vibe

okay so first of all, hi bestie, welcome to the Kernel API Manual ✨ the page header technically reads pci_aer_unma...ernal_errors(9) (yes it's truncated, yes it's giving "mom texted the first 20 characters and gave up", we move on 💀) and the whole thing lives in the Kernel API Manual, which is exactly where you'd expect a function this iconic to be.

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✨ NAME ✨

pci_aer_unmask_internal_errors — literally just unmask internal errors. that's the whole job. she's a one-line queen 👑

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🦋 SYNOPSIS 🦋

void pci_aer_unmask_internal_errors (struct pci_dev *dev );

no return value, no drama, just vibes and a void. periodt.

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🎀 ARGUMENTS 🎀

• dev — pointer to the pci_dev data structure. that's it, that's the whole argument list. she takes one (1) pointer and she's out 🫶

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🌸 DESCRIPTION 🌸

so what she actually does: she unmasks internal errors in the Uncorrectable and Correctable Error Mask registers. both of them. Mask registers, plural, no cap 🔥

think of it as taking your phone off Do Not Disturb for error notifications specifically. the errors were always happening, bestie, you just weren't being told about them 💀 anyway the masking is now undone and the errors are free to make themselves known.

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⭐ NOTE ⭐

huge caveat incoming, do not skip this: AER must be enabled and supported by the device, and you have to check that in advance — like, before you call her. the manpage literally suggests checking e.g. with pcie_aer_is_native. so do your vibe check first, bestie 🙈

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💖 SEE ALSO 💖

okay this section ate, it's a whole group chat. first the kernel file this page comes from:

./drivers/pci/pcie/aer.c

and then the entire friend group:

• enable_ecrc_checking(9)
• disable_ecrc_checking(9)
• pcie_set_ecrc_checking(9)
• pcie_ecrc_get_policy(9)
• pci_aer_raw_clear_status(9)
• add_error_device(9)
• is_error_source(9)
• find_source_device(9)
• pci_aer_handle_error(9)
• aer_get_device_error_info(9)
• aer_isr_one_error_type(9)
• aer_isr_one_error(9)
• aer_isr(9)
• aer_irq(9)
• aer_enable_rootport(9)
• aer_disable_rootport(9)
• aer_remove(9)
• aer_probe(9)
• aer_root_reset(9)
• pcie_aer_init(9)

like genuinely every single one of them is listed, no gatekeeping 💜

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and that's the page!! you understood the assignment, bestie 🌈

sign-off: this one came out of ./drivers/pci/pcie, dated October 2026, and the footer still says pci_aer_unma...ernal_errors(9) because apparently even the footer is committing to the truncated bit 😭 slay, honestly 🎀🦋