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