Orin C7 PCIe EP set Ethernet Interface over PCIe msi interrupt error

HI

I used orin C7 for PCIe EP, ref Bringing up an Ethernet Interface over PCIe, but when execut cmd “echo 16 > functions/pci_epf_tvnet/func1/msi_interrupts”, it generate error :

[ 131.737274] pci_epf_tvnet pci_epf_tvnet.0: failed to get ctrl syncpt irq: -22

[ 131.744716] pci_epf_tvnet pci_epf_tvnet.0: irqsp setup failed: -22

I think this number 16 if for C5, but which number is for C7?