Re: [PATCH 0/37] PCI/MSI: Enforce explicit IRQ vector management by removing devres auto-free
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From: Simon Richter <hidden>
Date: 2026-02-24 04:14:48
Also in:
dmaengine, dri-devel, linux-arm-msm, linux-crypto, linux-cxl, linux-gpio, linux-i2c, linux-i3c, linux-input, linux-iommu, linux-media, linux-mmc, linux-pci, linux-riscv, linux-serial, linux-spi, linux-usb, platform-driver-x86
Hi, On 2/24/26 12:29 AM, Shawn Lin wrote:
When such a driver also uses `pcim_enable_device()`, the devres framework may attempt to free the IRQ vectors a second time upon device release, leading to a double-free. Analysis of the tree shows this hazardous pattern exists widely, while 35 other drivers correctly rely solely on the implicit cleanup.
Would it make sense to have a function pcim_free_irq_vectors(), to allow explicit freeing even if the device is otherwise managed, analogous to pcim_iounmap()? Simon