Re: [v4.1.10-rt10][PATCH 0/2] PCI: dra7xx/dwc: fix "WARNING: CPU: 1 PID: 82 at kernel/irq/handle.c:150 handle_irq_event_percpu"

From: Grygorii Strashko
Date: Tue Nov 03 2015 - 14:11:28 EST

On 11/03/2015 03:46 PM, Sebastian Andrzej Siewior wrote:
> On 11/02/2015 08:30 PM, Grygorii Strashko wrote:
>> On -RT above code will generate warnings, because driver_xx_hw_irq_handler()
>> will be forced threaded (by default) and, as result, generic_handle_irq()
>> will be called with IRQs enabled. To W/A this issue generic_handle_irq() can
>> be surrounded by raw_spin_lock_irqsave/irqrestore(wa_lock).
> and what happens without -RT if you boot threadedirqs?

Yep. It will still warn :( Can be reworked to cover this case also, i think
(if overall concept will be accepted)

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