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authorZhenzhong Duan <zhenzhong.duan@oracle.com>2019-10-18 08:49:29 +0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-10-22 11:43:17 +0200
commit31d851407f90076c58291fb5eadc82c1dd613cee (patch)
tree8c8174dfb72dcb51426db6f9650844c6041249a2 /drivers/cpuidle
parent7d194c2100ad2a6dded545887d02754948ca5241 (diff)
cpuidle: haltpoll: Take 'idle=' override into account
Currenly haltpoll isn't aware of the 'idle=' override, the priority is 'idle=poll' > haltpoll > 'idle=halt'. When 'idle=poll' is used, cpuidle driver is bypassed but current_driver in sys still shows 'haltpoll'. When 'idle=halt' is used, haltpoll takes precedence and makes 'idle=halt' have no effect. Add a check to prevent the haltpoll driver from loading if 'idle=' is present. Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com> Co-developed-by: Joao Martins <joao.m.martins@oracle.com> [ rjw: Subject ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpuidle')
-rw-r--r--drivers/cpuidle/cpuidle-haltpoll.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/cpuidle/cpuidle-haltpoll.c b/drivers/cpuidle/cpuidle-haltpoll.c
index 932390b028f1..b0ce9bc78113 100644
--- a/drivers/cpuidle/cpuidle-haltpoll.c
+++ b/drivers/cpuidle/cpuidle-haltpoll.c
@@ -95,6 +95,10 @@ static int __init haltpoll_init(void)
int ret;
struct cpuidle_driver *drv = &haltpoll_driver;
+ /* Do not load haltpoll if idle= is passed */
+ if (boot_option_idle_override != IDLE_NO_OVERRIDE)
+ return -ENODEV;
+
cpuidle_poll_state_init(drv);
if (!kvm_para_available() ||