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authorDavid Daney <ddaney@caviumnetworks.com>2011-03-25 22:38:48 +0300
committerThomas Gleixner <tglx@linutronix.de>2011-03-27 19:45:58 +0400
commitd72274e5895d11570a0a4a3214a1933c86d5ccb7 (patch)
tree3925786563e67241cc5798ebbbcf79c0ce738f69 /kernel/irq/chip.c
parent16c29dafcc86024048f1dbb8349d31cb22c7c55a (diff)
downloadlinux-d72274e5895d11570a0a4a3214a1933c86d5ccb7.tar.xz
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 <ddaney@caviumnetworks.com> 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 <tglx@linutronix.de>
Diffstat (limited to 'kernel/irq/chip.c')
-rw-r--r--kernel/irq/chip.c6
1 files changed, 6 insertions, 0 deletions
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);