Cédric Le Goater <c...@kaod.org> writes:
> On 1/13/20 2:01 PM, Cédric Le Goater wrote:
>> From: Frederic Barrat <fbar...@linux.ibm.com>
>>
>> A load on an ESB page returning all 1's means that the underlying
>> device has invalidated the access to the PQ state of the interrupt
>> through mmio. It may happen, for example when querying a PHB interrupt
>> while the PHB is in an error state.
>>
>> In that case, we should consider the interrupt to be invalid when
>> checking its state in the irq_get_irqchip_state() handler.
>
>
> and we need also these tags :
>
> Fixes: da15c03b047d ("powerpc/xive: Implement get_irqchip_state method for
> XIVE to fix shutdown race")
> Cc: sta...@vger.kernel.org # v5.3+
I added those, although it's v5.4+, as the offending commit was first
included in v5.4-rc1.
cheers
