Hi,
> When a driver calls pcmcia_request_irq with IRQ_HANDLE_PRESENT unset, it looks
> for an open IRQ by request_irq()ing with a dummy handler and NULL dev_info.
> free_irq uses dev_info as a key for identifying the handler to free among
> those
> sharing an IRQ, so request_irq returns -EINVAL if dev_info is NULL and the IRQ
> may be shared. That unknown error code is the -EINVAL.
>
> It looks like only pcnet_cs and axnet_cs are affected. Most other drivers let
> pcmcia_request_irq install their interrupt handlers. sym53c500_cs requests
> its
> IRQ manually, but it cannot share an IRQ.
>
> The appended patch changes pcmcia_request_irq to pass an arbitrary, unique,
> non-NULL dev_info with the dummy handler.
Thanks for the excellent debugging. Your patch seems to work, however it
might be better to do just this:
Index: 2.6.13-rc3-git2/drivers/pcmcia/pcmcia_resource.c
===================================================================
--- 2.6.13-rc3-git2.orig/drivers/pcmcia/pcmcia_resource.c
+++ 2.6.13-rc3-git2/drivers/pcmcia/pcmcia_resource.c
@@ -800,7 +800,7 @@ int pcmcia_request_irq(struct pcmcia_dev
} else {
int try;
u32 mask = s->irq_mask;
- void *data = NULL;
+ void *data = test_action;
for (try = 0; try < 64; try++) {
irq = try % 32;
Thanks,
Dominik
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