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genirq/irqdomain: Add force reactivation flag to irq domains

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Allow irqdomains to tell the core code, that after early activation the
interrupt needs to be reactivated at request_irq() time.

This allows reservation of vectors at early activation time and actual
vector assignment at request_irq() time.

Signed-off-by: Thomas Gleixner <[email protected]>
Tested-by: Juergen Gross <[email protected]>
Tested-by: Yu Chen <[email protected]>
Acked-by: Juergen Gross <[email protected]>
Cc: Boris Ostrovsky <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Marc Zyngier <[email protected]>
Cc: Alok Kataria <[email protected]>
Cc: Joerg Roedel <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Rui Zhang <[email protected]>
Cc: "K. Y. Srinivasan" <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Len Brown <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
This commit is contained in:
Thomas Gleixner 2017-09-13 23:29:13 +02:00
commit 22d0b12f35
2 changed files with 7 additions and 0 deletions
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2
kernel/irq/msi.c
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@ -404,6 +404,8 @@ int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,
ret = irq_domain_activate_irq(irq_data, true);
if (ret)
goto cleanup;
if (info->flags & MSI_FLAG_MUST_REACTIVATE)
irqd_clr_activated(irq_data);
}
}
return 0;