path: root/arch/arm/mach-omap2/smartreflex.c
diff options
authorColin Cross <ccross@google.com>2011-07-22 00:55:52 -0500
committerKevin Hilman <khilman@ti.com>2011-08-05 11:54:59 -0700
commit98333b3dda1e490b02304a6a6643c294d4e520c3 (patch)
treeef9a495f4c54c3dbd52b07393c0bb847c19d2cac /arch/arm/mach-omap2/smartreflex.c
parent8c7f65943dfb93c2583f935f20ec39e8559d93d3 (diff)
OMAP2+: PM: SmartReflex: use put_sync_suspend for IRQ-safe disabling
omap_sr_disable_reset_volt is called with irqs off in omapx_enter_sleep, as part of idle sequence, this eventually calls sr_disable and pm_runtime_put_sync. pm_runtime_put_sync calls rpm_idle, which will enable interrupts in order to call the callback. In this short interval when interrupts are enabled, scenarios such as the following can occur: while interrupts are enabled, the timer interrupt that is supposed to wake the device out of idle occurs and is acked, so when the CPU finally goes to off, the timer is already gone, missing a wakeup event. Further, as the documentation for runtime states:" However, subsystems can use the pm_runtime_irq_safe() helper function to tell the PM core that a device's ->runtime_suspend() and ->runtime_resume() callbacks should be invoked in atomic context with interrupts disabled (->runtime_idle() is still invoked the default way)." Hence, replace pm_runtime_put_sync with pm_runtime_put_sync_suspend to invoke the suspend handler and shut off the fclk for SmartReflex module instead of using the idle handler in interrupt disabled context. Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Colin Cross <ccross@google.com> [khilman@ti.com: minor Subject edits] Signed-off-by: Kevin Hilman <khilman@ti.com>
Diffstat (limited to 'arch/arm/mach-omap2/smartreflex.c')
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index dc8e86a54ac..34c01a7de81 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -621,7 +621,7 @@ void sr_disable(struct voltagedomain *voltdm)
- pm_runtime_put_sync(&sr->pdev->dev);
+ pm_runtime_put_sync_suspend(&sr->pdev->dev);