On Wed, Oct 05, 2022 at 11:53:58AM -0500, Bjorn Helgaas wrote: > On Wed, Oct 05, 2022 at 01:00:58PM +0000, bugzilla-daemon@xxxxxxxxxx wrote: > > https://bugzilla.kernel.org/show_bug.cgi?id=216555 > > Summary: Kernel 4.19.135: pci_resource_start, pci_resource_len > > return wrong value > > > I used 4.19.135(x64) + rootfs (buildroot) to boot an x86 SBC. > > This SBC is connected via PCIe to a customized PCIe IO card. > > > > In the kernel module, I used pci_resource_start, pci_resource_len to find > > start, length of 3 BARs. > > It worked fine. > > > > Then I used the same kernel, kernel module on another x86 SBC. > > In this SBC, pci_resource_start, pci_resource_len returned wrong data. > > I booted this SBC with Centos 8.2 (4.18) and also with vanilla 4.9.20. > > It worked fine. > > > > Is it possible that 4.19.135 has a BUG ? > > It's unlikely that pci_resource_start() and pci_resource_len() are > broken in 4.19.135, but I guess anything is possible. > > Can you give any more details about why it seems broken? Dmesg logs > of a boot that fails and one that works, for instance? I see that you attached a dmesg log and some more details to the bugzilla, thank you! I don't see "AdtIoInit" in the kernel tree, and I can't match the [1172:0001] with anything. Can you also attach the driver source to the bugzilla? Bjorn
