diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2017-11-17 02:00:52 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-01-18 15:43:44 +1100 |
| commit | ced54c08d8e4060d59c10629ea5a4ccdaed6898e (patch) | |
| tree | 7b2bb0b8785e064f346dd786d9d36933984ccef5 /drivers/cpuidle | |
| parent | f1343d044629f11e7d63ef1a07edb1db585302e0 (diff) | |
| download | linux-ced54c08d8e4060d59c10629ea5a4ccdaed6898e.tar.bz2 | |
cpuidle/powernv: avoid double irq enable coming out of idle
Since e1689795a7 ("cpuidle: Add common time keeping and irq enabling"),
cpuidle drivers are expected to return from ->enter with irqs disabled.
Update the cpuidle-powernv snooze and cede loops to disable irqs before
returning.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/cpuidle')
| -rw-r--r-- | drivers/cpuidle/cpuidle-pseries.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/cpuidle/cpuidle-pseries.c b/drivers/cpuidle/cpuidle-pseries.c index a187a39fb866..0f2b697cbb27 100644 --- a/drivers/cpuidle/cpuidle-pseries.c +++ b/drivers/cpuidle/cpuidle-pseries.c @@ -51,8 +51,6 @@ static inline void idle_loop_epilog(unsigned long in_purr) get_lppaca()->wait_state_cycles = cpu_to_be64(wait_cycles); get_lppaca()->idle = 0; - if (irqs_disabled()) - local_irq_enable(); ppc64_runlatch_on(); } @@ -87,6 +85,8 @@ static int snooze_loop(struct cpuidle_device *dev, HMT_medium(); clear_thread_flag(TIF_POLLING_NRFLAG); + local_irq_disable(); + idle_loop_epilog(in_purr); return index; @@ -121,6 +121,7 @@ static int dedicated_cede_loop(struct cpuidle_device *dev, HMT_medium(); check_and_cede_processor(); + local_irq_disable(); get_lppaca()->donate_dedicated_cpu = 0; idle_loop_epilog(in_purr); @@ -145,6 +146,7 @@ static int shared_cede_loop(struct cpuidle_device *dev, */ check_and_cede_processor(); + local_irq_disable(); idle_loop_epilog(in_purr); return index; |