PCIe DMA Driver for Linux

Question

I am currently working on a Virtex 7 FPGA . I am trying to install the driver for the PCIe DMA driver for linux . But it is giving me the following error :

error: implicit declaration of function 'pci_enable_msix' [-Werror=implicit-function-declaration]

Can someone help me with this error ?

Answer 1

Linux 4.8 replaced it with pci_enable_msix_range . You can fix it like this:

#if LINUX_VERSION_CODE < KERNEL_VERSION(4,8,0)
        rc = pci_enable_msix(pdev, lro->entry, req_nvec);
#else
        rc = pci_enable_msix_range(pdev, lro->entry, req_nvec, req_nvec);
#endif

Answer 2

Linux交叉引用是解决此类问题的很好资源，因为您可以探索API在内核版本上的变化。