[PATCH] genirq: irq_chip->startup() usage in setup_irq and set_irq_chained handler

Pawel MOLL
2008-08-21T10:32:15Z

This patch clarifies a usage of irq_chip->startup() callback:

1. The "if (startup) startup(); else enabled();" code in setup_irq()
is unnecessary, as startup() falls back to enabled() via
default callbacks, set by irq_chip_set_defaults().

2. When using set_irq_chained_handler() the startup() was never called,
which is not good at all... Fixed. And again - when startup() is not
defined the call will fall back to enable() than to unmask() via
default callbacks.

Signed-off-by: Pawel Moll <pawel.moll@st.com>
Cc: Ingo Molnar <mingo@elte.hu>
---
kernel/irq/chip.c | 2 +-
kernel/irq/manage.c | 5 +----
2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 7279484..a32c337 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -595,7 +595,7 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
desc->status &= ~IRQ_DISABLED;
desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE;
desc->depth = 0;
- desc->chip->unmask(irq);
+ desc->chip->startup(irq);
}
spin_unlock_irqrestore(&desc->lock, flags);
}
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index fdccfd5..d0af30c 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -369,10 +369,7 @@ int setup_irq(unsigned int irq, struct irqaction *new)
if (!(desc->status & IRQ_NOAUTOEN)) {
desc->depth = 0;
desc->status &= ~IRQ_DISABLED;
- if (desc->chip->startup)
- desc->chip->startup(irq);
- else
- desc->chip->enable(irq);
+ desc->chip->startup(irq);
} else
/* Undo nested disables: */
desc->depth = 1;
--
1.5.5.1