Hi Tiejun, Thanks for the reply.
Omm. > > Often we always disable this pref windows so please disable this window. > Try use > the following ways to clear PCI_PREF_MEMORY_BASE and PCI_PREF_MEMORY_LIMIT. > ------ > pci_write_config_word(dev, PCI_PREF_MEMORY_BASE, 0); > pci_write_config_word(dev, PCI_PREF_MEMORY_LIMIT, 0); > > I have a little confusion about what you said. You said I should disable prefetched window corresponds to PCI Bridge to [bus 02-ff], the dmesgs shows that it is already disabled. pci 0001:01:00.0: PCI bridge to [bus 02-ff] pci 0001:01:00.0: bridge window [io 0x0000-0x0000] (disabled) pci 0001:01:00.0: bridge window [mem 0x00000000-0x000fffff] (disabled) *pci 0001:01:00.0: bridge window [mem 0x00000000-0x000fffff pref] (disabled)* Is it something that I am not getting right or you have miss read something? If it is problem with me, then what should be the O/P in case when I disable the prefetch window (by issuing pci_write_config_word(dev, PCI_PREF_MEMORY_BASE, 0); and pci_write_config_word(dev, PCI_PREF_MEMORY_LIMIT, 0); function calls)? And also, I will be really thankful to you if you also tell me the function in which I should place there function calls as I am new to linux device driver programming. Regards, Ravi
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