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: Sebastian Andrzej Siewior
Date: Tue Nov 03 2015 - 08:46:30 EST


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?

Sebastian
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