From: Len Brown <len.brown@xxxxxxxxx> Subject: [PATCH] ACPI: prevent processor.max_cstate=0 boot crash As processor.max_cstate is an init-time-only modparam, sanity checking it at init-time is sufficient. http://bugzilla.kernel.org/show_bug.cgi?id=13142 Signed-off-by: Len Brown <len.brown@xxxxxxxxx> --- drivers/acpi/processor_idle.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 6fe1214..436127e 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -1037,6 +1037,9 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr) dev->states[i].desc[0] = '\0'; } + if (max_cstate == 0) + max_cstate = 1; + for (i = 1; i < ACPI_PROCESSOR_MAX_POWER && i <= max_cstate; i++) { cx = &pr->power.states[i]; state = &dev->states[count]; -- 1.6.3.rc1.34.g0be9b -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
