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pcmcia: irq probe can be done without risking an IRQ storm

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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;