From 3418d72404e35eb19e7995cbf3e7a76ba8fefbce Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 29 Jun 2006 02:24:49 -0700 Subject: [PATCH] genirq: add IRQ_NOPROBE support Introduce IRQ_NOPROBE: enables platforms to control chip-probing. Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/irq/autoprobe.c | 4 ++-- kernel/irq/manage.c | 4 ++++ 2 files changed, 6 insertions(+), 2 deletions(-) (limited to 'kernel') diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c index 5c988bba401f..ed98c7d46cf2 100644 --- a/kernel/irq/autoprobe.c +++ b/kernel/irq/autoprobe.c @@ -40,7 +40,7 @@ unsigned long probe_irq_on(void) desc = irq_desc + i; spin_lock_irq(&desc->lock); - if (!desc->action) + if (!desc->action && !(desc->status & IRQ_NOPROBE)) desc->chip->startup(i); spin_unlock_irq(&desc->lock); } @@ -57,7 +57,7 @@ unsigned long probe_irq_on(void) desc = irq_desc + i; spin_lock_irq(&desc->lock); - if (!desc->action) { + if (!desc->action && !(desc->status & IRQ_NOPROBE)) { desc->status |= IRQ_AUTODETECT | IRQ_WAITING; if (desc->chip->startup(i)) desc->status |= IRQ_PENDING; diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index cffde4843897..90a944a7fadc 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -118,6 +118,10 @@ void enable_irq(unsigned int irq) WARN_ON(1); break; case 1: { + unsigned int status = desc->status & ~IRQ_DISABLED; + + /* Prevent probing on this irq: */ + desc->status = status | IRQ_NOPROBE; check_irq_resend(desc, irq); /* fall-through */ } -- cgit v1.2.2