irqchip/gic: Return an error if GIC initialisation fails

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If the GIC initialisation fails, then currently we do not return an error
or clean-up afterwards. Although for root controllers, this failure may be
fatal anyway, for secondary controllers, it may not be fatal and so return
an error on failure and clean-up.

Update the functions gic_cpu_init() and gic_pm_init() to return an error
instead of calling BUG() and perform any necessary clean-up.

For non-banked GIC controllers, make sure that we free any memory
allocated if we fail to initialise the IRQ domain. Please note that
free_percpu() only frees memory if the pointer passed to it is not NULL
and so it is unnecessary to check if both pointers are valid or not.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

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Jon Hunter 2016-05-10 16:14:42 +01:00 • committed by Marc Zyngier

parent c2baa2f3f4

commit dc9722cc57

1 changed files with 73 additions and 26 deletions

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drivers/irqchip/irq-gic.c

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