[+cc linux-pci] 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? Bjorn
