diff options
| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2006-05-16 17:16:44 +0200 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2006-06-30 22:09:10 +0200 |
| commit | c533120b8da215dc02310c535fa87c5c480d0f14 (patch) | |
| tree | 5142cad1107953e1655c7153ef10b7cc0719f068 /drivers/pcmcia | |
| parent | [PATCH] pcmcia: expose tool in pcmcia/Documentation/pcmcia/ (diff) | |
| download | linux-c533120b8da215dc02310c535fa87c5c480d0f14.tar.xz linux-c533120b8da215dc02310c535fa87c5c480d0f14.zip | |
[PATCH] pcmcia: warn if driver requests exclusive, but gets a shared IRQ
The patch below cleans up the pcmcia code a bit on the IRQ side (I did
this while debugging the problem just so I could read wtf it was doing),
and also adds a warning and passes back the correct information when a
device asks for exclusive but gets given shared. This at least means the
dmesg dump of a problem triggered by this will have a signature to find.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'drivers/pcmcia')
| -rw-r--r-- | drivers/pcmcia/pcmcia_resource.c | 27 |
1 files changed, 18 insertions, 9 deletions
diff --git a/drivers/pcmcia/pcmcia_resource.c b/drivers/pcmcia/pcmcia_resource.c index 3131bb0a0095..3281e519e714 100644 --- a/drivers/pcmcia/pcmcia_resource.c +++ b/drivers/pcmcia/pcmcia_resource.c @@ -788,6 +788,7 @@ int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req) struct pcmcia_socket *s = p_dev->socket; config_t *c; int ret = CS_IN_USE, irq = 0; + int type; if (!(s->state & SOCKET_PRESENT)) return CS_NO_CARD; @@ -797,6 +798,13 @@ int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req) if (c->state & CONFIG_IRQ_REQ) return CS_IN_USE; + /* Decide what type of interrupt we are registering */ + type = 0; + if (s->functions > 1) /* All of this ought to be handled higher up */ + type = SA_SHIRQ; + if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) + type = SA_SHIRQ; + #ifdef CONFIG_PCMCIA_PROBE if (s->irq.AssignedIRQ != 0) { /* If the interrupt is already assigned, it must be the same */ @@ -822,9 +830,7 @@ int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req) * marked as used by the kernel resource management core */ ret = request_irq(irq, (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action, - ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) || - (s->functions > 1) || - (irq == s->pci_irq)) ? SA_SHIRQ : 0, + type, p_dev->devname, (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data); if (!ret) { @@ -839,18 +845,21 @@ int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req) if (ret && !s->irq.AssignedIRQ) { if (!s->pci_irq) return ret; + type = SA_SHIRQ; irq = s->pci_irq; } - if (ret && req->Attributes & IRQ_HANDLE_PRESENT) { - if (request_irq(irq, req->Handler, - ((req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) || - (s->functions > 1) || - (irq == s->pci_irq)) ? SA_SHIRQ : 0, - p_dev->devname, req->Instance)) + if (ret && (req->Attributes & IRQ_HANDLE_PRESENT)) { + if (request_irq(irq, req->Handler, type, p_dev->devname, req->Instance)) return CS_IN_USE; } + /* Make sure the fact the request type was overridden is passed back */ + if (type == SA_SHIRQ && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) { + req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING; + printk(KERN_WARNING "pcmcia: request for exclusive IRQ could not be fulfilled.\n"); + printk(KERN_WARNING "pcmcia: the driver needs updating to supported shared IRQ lines.\n"); + } c->irq.Attributes = req->Attributes; s->irq.AssignedIRQ = req->AssignedIRQ = irq; s->irq.Config++; |