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authorThomas Gleixner <tglx@linutronix.de>2020-08-26 13:16:31 +0200
committerThomas Gleixner <tglx@linutronix.de>2020-09-16 16:52:28 +0200
commit585dfe8abc4460810c07114b64aca10a74fa2718 (patch)
tree01e98f41db17036d13a2c41946a0affd4927202e /kernel/irq/internals.h
parentccbecea1460201f87b92cc97bc4707e2c89ed654 (diff)
downloadlinux-stericsson-585dfe8abc4460810c07114b64aca10a74fa2718.tar.gz
PCI: vmd: Dont abuse vector irqomain as parent
VMD has it's own PCI/MSI interrupt domain which is not in any way depending on the x86 vector domain. PCI devices behind VMD share the VMD MSIX vector entries via a VMD specific message translation to the actual VMD MSIX vector. The VMD device interrupt handler for the VMD MSIX vectors invokes all interrupt handlers of the devices which share a vector. Making the x86 vector domain the actual parent of the VMD irq domain is pointless and actually counterproductive. When a device interrupt is requested then it will activate the interrupt which traverses down the hierarchy and consumes an interrupt vector in the vector domain which is never used. The domain is self contained and has no parent dependencies, so just hand in NULL for the parent and be done with it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20200826112330.928952181@linutronix.de
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