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authorThomas Gleixner <tglx@linutronix.de>2006-06-29 05:24:49 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-29 13:26:24 -0400
commit3418d72404e35eb19e7995cbf3e7a76ba8fefbce (patch)
tree08e727f94d4ff31410730d5d42119b3520ad10ca /kernel
parenta4633adcdbc15ac51afcd0e1395de58cee27cf92 (diff)
[PATCH] genirq: add IRQ_NOPROBE support
Introduce IRQ_NOPROBE: enables platforms to control chip-probing. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/irq/autoprobe.c4
-rw-r--r--kernel/irq/manage.c4
2 files changed, 6 insertions, 2 deletions
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)
40 desc = irq_desc + i; 40 desc = irq_desc + i;
41 41
42 spin_lock_irq(&desc->lock); 42 spin_lock_irq(&desc->lock);
43 if (!desc->action) 43 if (!desc->action && !(desc->status & IRQ_NOPROBE))
44 desc->chip->startup(i); 44 desc->chip->startup(i);
45 spin_unlock_irq(&desc->lock); 45 spin_unlock_irq(&desc->lock);
46 } 46 }
@@ -57,7 +57,7 @@ unsigned long probe_irq_on(void)
57 desc = irq_desc + i; 57 desc = irq_desc + i;
58 58
59 spin_lock_irq(&desc->lock); 59 spin_lock_irq(&desc->lock);
60 if (!desc->action) { 60 if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
61 desc->status |= IRQ_AUTODETECT | IRQ_WAITING; 61 desc->status |= IRQ_AUTODETECT | IRQ_WAITING;
62 if (desc->chip->startup(i)) 62 if (desc->chip->startup(i))
63 desc->status |= IRQ_PENDING; 63 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)
118 WARN_ON(1); 118 WARN_ON(1);
119 break; 119 break;
120 case 1: { 120 case 1: {
121 unsigned int status = desc->status & ~IRQ_DISABLED;
122
123 /* Prevent probing on this irq: */
124 desc->status = status | IRQ_NOPROBE;
121 check_irq_resend(desc, irq); 125 check_irq_resend(desc, irq);
122 /* fall-through */ 126 /* fall-through */
123 } 127 }