From: David Daney Date: Fri, 25 Mar 2011 19:38:48 +0000 (-0700) Subject: genirq: Reserve the irq when calling irq_set_chip() X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=d72274e5895d11570a0a4a3214a1933c86d5ccb7;p=deliverable%2Flinux.git genirq: Reserve the irq when calling irq_set_chip() The helper macros and functions like for_each_active_irq() don't work unless the irq is in the allocated_irqs set. In the case of !CONFIG_SPARSE_IRQ, instead of forcing all users of the irq infrastructure to explicitly call irq_reserve_irq(), do it for them. Signed-off-by: David Daney Cc: linux-mips@linux-mips.org Cc: ralf@linux-mips.org LKML-Reference: <1301081931-11240-2-git-send-email-ddaney@caviumnetworks.com> Signed-off-by: Thomas Gleixner --- diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index c9c0601f0615..c35d74c08b50 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -37,6 +37,12 @@ int irq_set_chip(unsigned int irq, struct irq_chip *chip) irq_chip_set_defaults(chip); desc->irq_data.chip = chip; irq_put_desc_unlock(desc, flags); + /* + * For !CONFIG_SPARSE_IRQ make the irq show up in + * allocated_irqs. For the CONFIG_SPARSE_IRQ case, it is + * already marked, and this call is harmless. + */ + irq_reserve_irq(irq); return 0; } EXPORT_SYMBOL(irq_set_chip);