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FromDavid Daney <>
Subject[PATCH v3 1/4] genirq: Reserve the irq when calling irq_set_chip()
DateFri, 25 Mar 2011 12:38:48 -0700
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>
---
kernel/irq/chip.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index c9c0601..54d9aab 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 may
+ * already be there, and this call is harmless.
+ */
+ irq_reserve_irq(irq);
return 0;
}
EXPORT_SYMBOL(irq_set_chip);
--
1.7.2.3


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