MLX5_VSC_ADDR_OFFSET
pci_write_config(dev, vsc_addr + MLX5_VSC_ADDR_OFFSET, in, 4);
out = pci_read_config(dev, vsc_addr + MLX5_VSC_ADDR_OFFSET, 4);
pci_write_config(dev, vsc_addr + MLX5_VSC_ADDR_OFFSET, in, 4);
out = pci_read_config(dev, vsc_addr + MLX5_VSC_ADDR_OFFSET, 4);
pci_write_config(dev, vsc_addr + MLX5_VSC_ADDR_OFFSET, in, 4);
pci_write_config(dev, vsc_addr + MLX5_VSC_ADDR_OFFSET, in, 4);
flag = pci_read_config(dev, vsc_addr + MLX5_VSC_ADDR_OFFSET, 4);