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-rw-r--r--flashrom.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/flashrom.c b/flashrom.c
index f613f8a0..7e52fbc8 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -139,6 +139,13 @@ struct flashchip *probe_flash(struct flashchip *first_flash, int force)
fd_mem, (off_t) base);
if (bios == MAP_FAILED) {
perror("Can't mmap memory using " MEM_DEV);
+ if (EINVAL == errno) {
+ fprintf(stderr, "In Linux this error can be caused by the CONFIG_NONPROMISC_DEVMEM (<2.6.27),\n");
+ fprintf(stderr, "CONFIG_STRICT_DEVMEM (>=2.6.27) and CONFIG_X86_PAT kernel options.\n");
+ fprintf(stderr, "Please check if either is enabled in your kernel before reporting a failure.\n");
+ fprintf(stderr, "You can override CONFIG_X86_PAT at boot with the nopat kernel parameter but\n");
+ fprintf(stderr, "disabling the other option unfortunately requires a kernel recompile. Sorry!\n");
+ }
exit(1);
}
flash->virtual_memory = bios;