find_source_device(9)

💖 find_source_device(9) 💖

okay so this is a page from the Kernel API Manual — yes, that Kernel API Manual, the one your Linux-kernel bestie lives in 🐧✨ — and today's main character is find_source_device. it searches the device hierarchy for the source device, hence the name, we love a self-explanatory icon 👑

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✨ NAME ✨

find_source_device — search through device hierarchy for source device 🕵️‍♀️💅

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🌸 SYNOPSIS 🌸

bool find_source_device (struct pci_dev *parent , struct aer_err_info
*e_info );

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🎀 ARGUMENTS 🎀

• parent — pointer to Root Port pci_dev data structure, like. the whole point of entry bestie 🫶
• e_info — including detailed error information such as ID 🔍

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⭐ RETURN ⭐

true if found. that's it, that's the return 💫

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🦋 DESCRIPTION 🦋

Invoked by DPC when error is detected at the Root Port 🌈

important rules, no skipping 🙈 the caller of this function must set id, severity, and multi_error_valid of struct aer_err_info pointed by e_info properly. like, properly properly. do not come in here with a half-filled struct, i'm begging 😭

This function must fill e_info->error_dev_num and e_info->dev[], based on the given information 💖

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🔥 SEE ALSO 🔥

Kernel file ./drivers/pci/pcie/aer.c — the mothership 💀

• 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)
• pci_aer_unmask_internal_errors(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)

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and that's the page bestie, go read all twenty of those SEE ALSOs, i'll wait 🧚💜

mwah 💋 this lil number lives in ./drivers/pci/pcie, stamped October 2026, and yes it's still called find_source_device(9) — slay, stay iconic 👑✨