Commit 635416ef authored by Alan Cox's avatar Alan Cox Committed by Dominik Brodowski

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: default avatarAlan Cox <alan@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
parent 05f43d48
......@@ -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;
......
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