[adding Jiang to the cc list]
On 12/08/15 18:45, Grygorii Strashko wrote:
Now irq_chip_retrigger_hierarchy() returns -ENOSYS if it
was not able to find at least one .irq_retrigger() callback
implemented in IRQ domain hierarchy. As result, IRQ
re-triggering is not working now on ARM (TI OMAP) where
ARM GIC is not implemented this callback.
The .irq_retrigger() is optional (see check_irq_resend())
and there are no reasons to fail if it was not found, hence
lets return 0 in this case.
In case of TI OMAP DRA7 the following IRQ hierarchy is defined:
ARM GIC - OMAP wakeupgen - TI CBAR
Failure is reproduced during resume from suspend to RAM:
- wakeup by IRQx
- suspend_enter
+ arch_suspend_enable_irqs
+ handle_fasteoi_irq
+ irq_may_run
+ irq_pm_check_wakeup
+ irq_disable(IRQx)
+ dpm_resume_noirq()
+ resume_device_irqs
+ resume_irqs
+ resume_irq
+ __enable_irq == IRQx is not re-triggered
Fixes: 85f08c17de26 ('genirq: Introduce helper functions...')
Signed-off-by: Grygorii Strashko grygorii.stras...@ti.com
---
kernel/irq/chip.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 27f4332..6de638b 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -997,7 +997,7 @@ int irq_chip_retrigger_hierarchy(struct irq_data *data)
if (data-chip data-chip-irq_retrigger)
return data-chip-irq_retrigger(data);
- return -ENOSYS;
+ return 0;
}
/**
I think this makes sense. Not having an irq_retrigger or having an
irq_retrigger that returns zero are the same thing.
Actually, we don't even distinguish between a retrigger that
successfully poked the HW, and a retrigger that returned an error. Both
are considered to not to require a SW retrigger... maybe we should fix
that too. Jiang, Thomas?
Anyway, for this patch:
Reviewed-by: Marc Zyngier marc.zyng...@arm.com
M.
--
Jazz is not dead. It just smells funny...
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