ARM: CPU hotplug: ensure we migrate all IRQs off a downed CPU

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Our selection of interrupts to consider for IRQ migration is sub-
standard.  We were potentially including per-CPU interrupts in our
migration strategy, but omitting chained interrupts.  This caused
some interrupts to remain on a downed CPU.

We were also trying to migrate interrupts which were not migratable,
resulting in an OOPS.

Instead, iterate over all interrupts, skipping per-CPU interrupts
or interrupts whose affinity does not include the downed CPU, and
attempt to set the affinity for every one else if their chip
implements irq_set_affinity().

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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Russell King 2011-07-21 15:14:21 +01:00

parent ca15af19ac

commit 78359cb86b

1 changed files with 28 additions and 11 deletions

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arch/arm/kernel/irq.c

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