diff options
Diffstat (limited to 'drivers/pcmcia')
| -rw-r--r-- | drivers/pcmcia/ds.c | 3 | ||||
| -rw-r--r-- | drivers/pcmcia/pcmcia_resource.c | 137 |
2 files changed, 55 insertions, 85 deletions
diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c index 5fd2948..a2649c7 100644 --- a/drivers/pcmcia/ds.c +++ b/drivers/pcmcia/ds.c @@ -546,7 +546,6 @@ struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int fu p_dev->function_config = tmp_dev->function_config; p_dev->io = tmp_dev->io; p_dev->irq = tmp_dev->irq; - p_dev->irq_v = tmp_dev->irq_v; kref_get(&p_dev->function_config->ref); } @@ -571,7 +570,7 @@ struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int fu dev_printk(KERN_NOTICE, &p_dev->dev, "pcmcia: registering new device %s (IRQ: %d)\n", - p_dev->devname, p_dev->irq_v); + p_dev->devname, p_dev->irq); pcmcia_device_query(p_dev); diff --git a/drivers/pcmcia/pcmcia_resource.c b/drivers/pcmcia/pcmcia_resource.c index 8dce223..f355c5a 100644 --- a/drivers/pcmcia/pcmcia_resource.c +++ b/drivers/pcmcia/pcmcia_resource.c @@ -408,41 +408,6 @@ out: } /* pcmcia_release_io */ -static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req) -{ - struct pcmcia_socket *s = p_dev->socket; - config_t *c; - int ret = -EINVAL; - - mutex_lock(&s->ops_mutex); - - c = p_dev->function_config; - - if (!p_dev->_irq) - goto out; - - p_dev->_irq = 0; - - if (c->state & CONFIG_LOCKED) - goto out; - - if (s->pcmcia_irq != req->AssignedIRQ) { - dev_dbg(&s->dev, "IRQ must match assigned one\n"); - goto out; - } - - if (req->Handler) - free_irq(req->AssignedIRQ, p_dev->priv); - - ret = 0; - -out: - mutex_unlock(&s->ops_mutex); - - return ret; -} /* pcmcia_release_irq */ - - int pcmcia_release_window(struct pcmcia_device *p_dev, window_handle_t wh) { struct pcmcia_socket *s = p_dev->socket; @@ -681,61 +646,66 @@ out: EXPORT_SYMBOL(pcmcia_request_io); -/** pcmcia_request_irq +/** + * pcmcia_request_irq() - attempt to request a IRQ for a PCMCIA device * - * Request_irq() reserves an irq for this client. + * pcmcia_request_irq() is a wrapper around request_irq which will allow + * the PCMCIA core to clean up the registration in pcmcia_disable_device(). + * Drivers are free to use request_irq() directly, but then they need to + * call free_irq themselfves, too. Also, only IRQF_SHARED capable IRQ + * handlers are allowed. */ - -int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req) +int __must_check pcmcia_request_irq(struct pcmcia_device *p_dev, + irq_handler_t handler) { - struct pcmcia_socket *s = p_dev->socket; - config_t *c; - int ret = -EINVAL, irq = p_dev->irq_v; - int type = IRQF_SHARED; + int ret; - mutex_lock(&s->ops_mutex); + if (!p_dev->irq) + return -EINVAL; - if (!(s->state & SOCKET_PRESENT)) { - dev_dbg(&s->dev, "No card present\n"); - goto out; - } - c = p_dev->function_config; - if (c->state & CONFIG_LOCKED) { - dev_dbg(&s->dev, "Configuration is locked\n"); - goto out; - } + ret = request_irq(p_dev->irq, handler, IRQF_SHARED, + p_dev->devname, p_dev->priv); + if (!ret) + p_dev->_irq = 1; - if (!irq) { - dev_dbg(&s->dev, "no IRQ available\n"); - goto out; - } + return ret; +} +EXPORT_SYMBOL(pcmcia_request_irq); - if (!(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) { - req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING; - dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver " - "needs updating to supported shared IRQ lines.\n"); - } - if (req->Handler) { - ret = request_irq(irq, req->Handler, type, - p_dev->devname, p_dev->priv); - if (ret) { - dev_printk(KERN_INFO, &s->dev, - "request_irq() failed\n"); - goto out; - } - } +/** + * pcmcia_request_exclusive_irq() - attempt to request an exclusive IRQ first + * + * pcmcia_request_exclusive_irq() is a wrapper around request_irq which + * attempts first to request an exclusive IRQ. If it fails, it also accepts + * a shared IRQ, but prints out a warning. PCMCIA drivers should allow for + * IRQ sharing and either use request_irq directly (then they need to call + * free_irq themselves, too), or the pcmcia_request_irq() function. + */ +int __must_check +pcmcia_request_exclusive_irq(struct pcmcia_device *p_dev, irq_handler_t handler) +{ + int ret; - req->AssignedIRQ = irq; + if (!p_dev->irq) + return -EINVAL; - p_dev->_irq = 1; + ret = request_irq(p_dev->irq, handler, 0, p_dev->devname, p_dev->priv); + if (ret) { + ret = pcmcia_request_irq(p_dev, handler); + dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: " + "request for exclusive IRQ could not be fulfilled.\n"); + dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver " + "needs updating to supported shared IRQ lines.\n"); + } + if (ret) + dev_printk(KERN_INFO, &p_dev->dev, "request_irq() failed\n"); + else + p_dev->_irq = 1; - ret = 0; -out: - mutex_unlock(&s->ops_mutex); return ret; -} /* pcmcia_request_irq */ -EXPORT_SYMBOL(pcmcia_request_irq); +} /* pcmcia_request_exclusive_irq */ +EXPORT_SYMBOL(pcmcia_request_exclusive_irq); #ifdef CONFIG_PCMCIA_PROBE @@ -779,7 +749,7 @@ static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type) p_dev); if (!ret) { free_irq(irq, p_dev); - p_dev->irq_v = s->pcmcia_irq = irq; + p_dev->irq = s->pcmcia_irq = irq; pcmcia_used_irq[irq]++; break; } @@ -820,12 +790,12 @@ int pcmcia_setup_irq(struct pcmcia_device *p_dev) { struct pcmcia_socket *s = p_dev->socket; - if (p_dev->irq_v) + if (p_dev->irq) return 0; /* already assigned? */ if (s->pcmcia_irq) { - p_dev->irq_v = s->pcmcia_irq; + p_dev->irq = s->pcmcia_irq; return 0; } @@ -839,7 +809,7 @@ int pcmcia_setup_irq(struct pcmcia_device *p_dev) /* but use the PCI irq otherwise */ if (s->pci_irq) { - p_dev->irq_v = s->pcmcia_irq = s->pci_irq; + p_dev->irq = s->pcmcia_irq = s->pci_irq; return 0; } @@ -947,7 +917,8 @@ void pcmcia_disable_device(struct pcmcia_device *p_dev) { pcmcia_release_configuration(p_dev); pcmcia_release_io(p_dev, &p_dev->io); - pcmcia_release_irq(p_dev, &p_dev->irq); + if (p_dev->_irq) + free_irq(p_dev->irq, p_dev->priv); if (p_dev->win) pcmcia_release_window(p_dev, p_dev->win); } |