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| author | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2019-05-09 11:18:57 +0300 |
|---|---|---|
| committer | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2019-05-09 11:19:03 +0300 |
| commit | 752c4f3c1d19708578257ecc041672b6d8afb9bf (patch) | |
| tree | 75bf7773e3dcddb495540dbd3fd135702de738eb /arch/arm/mach-imx/cpuidle-imx6q.c | |
| parent | 3be2071004bf748ed39e54ccda85caaa774c7ccd (diff) | |
| parent | eb85d03e01c3e9f3b0ba7282b2e3515a635decb2 (diff) | |
| download | linux-752c4f3c1d19708578257ecc041672b6d8afb9bf.tar.xz | |
Merge remote-tracking branch 'drm/drm-next' into drm-misc-next
Requested for backmerging airlied's drm-legacy cleanup.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Diffstat (limited to 'arch/arm/mach-imx/cpuidle-imx6q.c')
| -rw-r--r-- | arch/arm/mach-imx/cpuidle-imx6q.c | 27 |
1 files changed, 10 insertions, 17 deletions
diff --git a/arch/arm/mach-imx/cpuidle-imx6q.c b/arch/arm/mach-imx/cpuidle-imx6q.c index bfeb25aaf9a2..326e870d7123 100644 --- a/arch/arm/mach-imx/cpuidle-imx6q.c +++ b/arch/arm/mach-imx/cpuidle-imx6q.c @@ -16,30 +16,23 @@ #include "cpuidle.h" #include "hardware.h" -static atomic_t master = ATOMIC_INIT(0); -static DEFINE_SPINLOCK(master_lock); +static int num_idle_cpus = 0; +static DEFINE_SPINLOCK(cpuidle_lock); static int imx6q_enter_wait(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index) { - if (atomic_inc_return(&master) == num_online_cpus()) { - /* - * With this lock, we prevent other cpu to exit and enter - * this function again and become the master. - */ - if (!spin_trylock(&master_lock)) - goto idle; + spin_lock(&cpuidle_lock); + if (++num_idle_cpus == num_online_cpus()) imx6_set_lpm(WAIT_UNCLOCKED); - cpu_do_idle(); - imx6_set_lpm(WAIT_CLOCKED); - spin_unlock(&master_lock); - goto done; - } + spin_unlock(&cpuidle_lock); -idle: cpu_do_idle(); -done: - atomic_dec(&master); + + spin_lock(&cpuidle_lock); + if (num_idle_cpus-- == num_online_cpus()) + imx6_set_lpm(WAIT_CLOCKED); + spin_unlock(&cpuidle_lock); return index; } |