On 2014/9/25 15:26, Thierry Reding wrote: > On Thu, Sep 25, 2014 at 11:14:16AM +0800, Yijing Wang wrote: >> Introduce weak arch_find_msi_chip() to find the match msi_chip. >> Currently, MSI chip associates pci bus to msi_chip. Because in >> ARM platform, there may be more than one MSI controller in system. >> Associate pci bus to msi_chip help pci device to find the match >> msi_chip and setup MSI/MSI-X irq correctly. But in other platform, >> like in x86. we only need one MSI chip, because all device use >> the same MSI address/data and irq etc. So it's no need to associate >> pci bus to MSI chip, just use a arch function, arch_find_msi_chip() >> to return the MSI chip for simplicity. The default weak >> arch_find_msi_chip() used in ARM platform, find the MSI chip >> by pci bus. > > Can't x86 simply set the bus' .msi field anyway? It would seem to be > easy to do and unifies the code rather than driving it further apart > using even more of the __weak functions. As mentioned in the first reply, I will rework this one when we find a better solution. Thanks! Yijing. > > Thierry > -- Thanks! Yijing -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
