commit 635416ef393e8cec5a89fc6c1de710ee9596a51e
Author: Alan Cox <[EMAIL PROTECTED]>
Date: Mon Jun 16 14:35:15 2008 +0200
pcmcia: irq probe can be done without risking an IRQ storm
Nowdays you can ask for an IRQ to be allocated but not enabled, when
PCMCIA
was written this was not true and this feature is thus not used
[EMAIL PROTECTED]: add comment and ifdef to avoid
compilation
breakage at least on alpha]
Signed-off-by: Alan Cox <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Dominik Brodowski <[EMAIL PROTECTED]>
diff --git a/drivers/pcmcia/pcmcia_resource.c
b/drivers/pcmcia/pcmcia_resource.c
index c8f77b8..78af594 100644
--- a/drivers/pcmcia/pcmcia_resource.c
+++ b/drivers/pcmcia/pcmcia_resource.c
@@ -812,6 +812,15 @@ int pcmcia_request_irq(struct pcmcia_device *p_dev,
irq_req
type = IRQF_SHARED;
#ifdef CONFIG_PCMCIA_PROBE
+
+#ifdef IRQ_NOAUTOEN
+ /* if the underlying IRQ infrastructure allows for it, only
allocate
+ * the IRQ, but do not enable it
+ */
+ if (!(req->Attributes & IRQ_HANDLE_PRESENT))
+ type |= IRQ_NOAUTOEN;
+#endif /* IRQ_NOAUTOEN */
+
if (s->irq.AssignedIRQ != 0) {
/* If the interrupt is already assigned, it must be the
same */
irq = s->irq.AssignedIRQ;
--
Powertop reports huge number of wakeups and drains battery
https://bugs.launchpad.net/bugs/145377
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