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xen: use the pirq number to check the pirq_eoi_map 

In pirq_check_eoi_map use the pirq number rather than the Linux irq
number to check whether an eoi is needed in the pirq_eoi_map.

The reason is that the irq number is not always identical to the
pirq number so if we wrongly use the irq number to check the
pirq_eoi_map we are going to check for the wrong pirq to EOI.

As a consequence some interrupts might not be EOI'ed by the
guest correctly.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Tested-by: Tobias Geiger <tobias.geiger@vido.info>
[v1: Added some extra wording to git commit]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
hifive-unleashed-5.1
Stefano Stabellini 2012-04-25 16:11:38 +01:00 committed by Konrad Rzeszutek Wilk
parent df88b2d96e
commit 521394e4e6
1 changed files with 1 additions and 1 deletions
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2
drivers/xen/events.c
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@ -274,7 +274,7 @@ static unsigned int cpu_from_evtchn(unsigned int evtchn)
static bool pirq_check_eoi_map(unsigned irq)
{
return test_bit(irq, pirq_eoi_map);
return test_bit(pirq_from_irq(irq), pirq_eoi_map);
}
static bool pirq_needs_eoi_flag(unsigned irq)