PCI MSI-X vectors in /proc/interrupts

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I'm developing a kernel device driver which is using 2 PCI MSI-X vectors. 

When the device comes up and I call pci_enable_msix() the kernel prints 

"[snip] irq 45 for MSI/MSI-X"
"[snip] irq 46 for MSI/MSI-X"

So it seems as if IRQs 45 and 46 are allocated for my device. However, when I look into /proc/interrupts, it lists my device under IRQ 42 and 43. Is it expected that those IRQ numbers match, e.g. something is broken in my device driver or kernel code? I use Linux 3.2.0-rc7.

Thanks for your help.

Anna
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