Some bad interaction between the idle and the suspend paths has been
noticed: the idle code is called during the suspend enter and exit
sequences. This could cause corruption or lock-up of resources.
The solution is to move the call to disable_hlt at the very beginning
of the suspend sequence (in omap3_pm_begin instead of omap3_pm_prepare),
and the call to enable_hlt at the very end of the suspend sequence
(in omap3_pm_end instead of omap3_pm_finish).
Tested with RET and OFF on Beagle and OMAP3EVM.
Signed-off-by: Jean Pihet <j-pihet@xxxxxx>
Cc: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-omap2/pm34xx.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 75c0cd1..022fdff 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -508,7 +508,6 @@ static suspend_state_t suspend_state;
static int omap3_pm_prepare(void)
{
- disable_hlt();
return 0;
}
@@ -576,12 +575,12 @@ static int omap3_pm_enter(suspend_state_t unused)
static void omap3_pm_finish(void)
{
- enable_hlt();
}
/* Hooks to enable / disable UART interrupts during suspend */
static int omap3_pm_begin(suspend_state_t state)
{
+ disable_hlt();
suspend_state = state;
omap_uart_enable_irqs(0);
return 0;
@@ -591,6 +590,7 @@ static void omap3_pm_end(void)
{
suspend_state = PM_SUSPEND_ON;
omap_uart_enable_irqs(1);
+ enable_hlt();
return;
}
--
1.7.2.3
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