From f3ed0a17f0292300b3caca32d823ecd32554a667 Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada Date: Thu, 11 Jul 2013 09:50:30 -0700 Subject: [PATCH] Thermal: x86 package temp thermal crash On systems with no package MSR support this caused crash as there is a bug in the logic to check presence of DTHERM and PTS feature together. Added a change so that when there is no PTS support, module doesn't get loaded. Even if some CPU comes online with the PTS feature disabled, and other CPUs has this support, this patch will still prevent such MSR accesses. Signed-off-by: Srinivas Pandruvada Reported-by: Daniel Walker Signed-off-by: Zhang Rui --- drivers/thermal/x86_pkg_temp_thermal.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/thermal/x86_pkg_temp_thermal.c b/drivers/thermal/x86_pkg_temp_thermal.c index 5de56f6..034604c 100644 --- a/drivers/thermal/x86_pkg_temp_thermal.c +++ b/drivers/thermal/x86_pkg_temp_thermal.c @@ -511,7 +511,7 @@ static int get_core_online(unsigned int cpu) /* Check if there is already an instance for this package */ if (!phdev) { - if (!cpu_has(c, X86_FEATURE_DTHERM) && + if (!cpu_has(c, X86_FEATURE_DTHERM) || !cpu_has(c, X86_FEATURE_PTS)) return -ENODEV; if (pkg_temp_thermal_device_add(cpu)) @@ -562,7 +562,7 @@ static struct notifier_block pkg_temp_thermal_notifier __refdata = { }; static const struct x86_cpu_id __initconst pkg_temp_thermal_ids[] = { - { X86_VENDOR_INTEL, X86_FAMILY_ANY, X86_MODEL_ANY, X86_FEATURE_DTHERM }, + { X86_VENDOR_INTEL, X86_FAMILY_ANY, X86_MODEL_ANY, X86_FEATURE_PTS }, {} }; MODULE_DEVICE_TABLE(x86cpu, pkg_temp_thermal_ids); -- 2.7.4