Re: [Bugfix] x86, irq: Fix a regression caused by commit b5dc8e6c21e7

From: Alexander Holler
Date: Sun Aug 09 2015 - 06:15:41 EST

Am 09.08.2015 um 10:15 schrieb Jiang Liu:
Alex Deucher, Mark Rustad and Alexander Holler reported a regression
with the latest v4.2-rc4 kernel, which breaks some SATA controllers.
With multi-MSI capable SATA controllers, only the first port works,
all other ports times out when executing SATA commands. This regression
bisects to 52f518a3a7c2 ("x86/MSI: Use hierarchical irqdomains to manage
MSI interrupts"), but it's not the root cause, it just triggers a bug
caused by b5dc8e6c21e7 ("x86/irq: Use hierarchical irqdomain to manage
CPU interrupt vectors").

With this patch applied, the affected SATA controllers work as expected.

Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
Reported-by: Alex Deucher <alexdeucher@xxxxxxxxx>
Reported-by: Mark Rustad <mrustad@xxxxxxxxx>
Reported-by: Alexander Holler <holler@xxxxxxxxxxxxx>
Hi Alex, Mark and Alexandler,
Sorry for the long delay to root cause this regression, it's
really annoying. Could you please help test this patch against the
latest v4.2-rcx?

Works. Thanks.

Tested-by: Alexander Holler <holler@xxxxxxxxxxxxx>

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