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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

[linux@dominikbrodowski.net: add comment and ifdef to avoid compilation
 breakage at least on alpha]
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Alan Cox 2008-06-16 14:35:15 +02:00 committed by Dominik Brodowski
parent 05f43d48dd
commit 635416ef39
1 changed files with 9 additions and 0 deletions
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9
drivers/pcmcia/pcmcia_resource.c
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@ -812,6 +812,15 @@ int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *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;