PCI: xgene-msi: Make per-CPU interrupt setup robust

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The way the per-CPU interrupts are dealt with in the XGene MSI
driver isn't great:

- the affinity is set after the interrupt is enabled

- nothing prevents userspace from moving the interrupt around

- the affinity setting code pointlessly allocates memory

- the driver checks for conditions that cannot possibly happen

Address all of this in one go, resulting in slightly simpler setup
code.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20250708173404.1278635-6-maz@kernel.org

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Marc Zyngier 2025-07-08 18:33:56 +01:00 • committed by Bjorn Helgaas

parent fddf72ed7b

commit d17e3f8a93

1 changed files with 6 additions and 23 deletions

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drivers/pci/controller/pci-xgene-msi.c

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