genirq: Add return value to check_irq_resend()

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In preparation for an interrupt injection interface which can be used
safely by error injection mechanisms. e.g. PCI-E/ AER, add a return value
to check_irq_resend() so errors can be propagated to the caller.

Split out the software resend code so the ugly #ifdef in check_irq_resend()
goes away and the whole thing becomes readable.

Fix up the caller in debugfs. The caller in irq_startup() does not care
about the return value as this is unconditionally invoked for all
interrupts and the resend is best effort anyway.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lkml.kernel.org/r/20200306130623.775200917@linutronix.de

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This commit is contained in:

Thomas Gleixner 2020-03-06 14:03:45 +01:00

parent 008f1d60fe

commit 1f85b1f5e1

3 changed files with 51 additions and 37 deletions

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3

kernel/irq/debugfs.c

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2

kernel/irq/internals.h

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83

kernel/irq/resend.c

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