RE: Unbalanced IRQ wake disable during resume from static suspend

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Hello Santosh

On Thu, 2 Dec 2010, Santosh Shilimkar wrote:

> Just a wild guess here but is this because the 'set_wake' is
> not setup and then fw might be returning some error whenever
> driver invoke this API as part of enable_irq_wake() callback
> 
> If that being the case, below patch might might help. Can
> somebody try this out ?

This patch might remove the warnings, but I doubt that it solves the root 
cause.  In any case, it doesn't seem correct to unconditionally return 0 
(success) from an omap_irq_wake() function, given that the OMAP INTC has 
no functionality in this regard.

The real problem appears to be in drivers/serial/serial_core.c.  
uart_suspend_port() doesn't check the return value of enable_irq_wake().  
Seems to me that it needs to save that return value somewhere and not 
bother calling disable_irq_wake() in uart_resume_port() if 
enable_irq_wake() returned an error.

That's the patch that I'd suggest that you guys put together and send to 
the Linux serial people.


- Paul
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