Guide: How to fix lsirec error message "mmap bar1: Invalid argument"

[nezach]

When running lsirec on Linux kernel 4.5 or later it will fail with error message:

mmap bar1: Invalid argument

You can work around this by booting with the "iomem=relaxed" paramter.

More info is provided here: HPE Support document - HPE Support Center

Kernel versions 4.5 (and later) enable a new kernel security measure "CONFIG_IO_STRICT_DEVMEM" by default that prevents user space tools from memory mapping device BAR when the device driver is loaded (resource is marked as BUSY). As a result, the "hfi1_eprom" tool cannot query/flash the device while the "hfi1" kernel module is loaded.