diff options
Diffstat (limited to 'drivers/acpi/evged.c')
| -rw-r--r-- | drivers/acpi/evged.c | 47 |
1 files changed, 41 insertions, 6 deletions
diff --git a/drivers/acpi/evged.c b/drivers/acpi/evged.c index 46f060356a22..f13ba2c07667 100644 --- a/drivers/acpi/evged.c +++ b/drivers/acpi/evged.c @@ -49,6 +49,11 @@ #define MODULE_NAME "acpi-ged" +struct acpi_ged_device { + struct device *dev; + struct list_head event_list; +}; + struct acpi_ged_event { struct list_head node; struct device *dev; @@ -76,7 +81,8 @@ static acpi_status acpi_ged_request_interrupt(struct acpi_resource *ares, unsigned int irq; unsigned int gsi; unsigned int irqflags = IRQF_ONESHOT; - struct device *dev = context; + struct acpi_ged_device *geddev = context; + struct device *dev = geddev->dev; acpi_handle handle = ACPI_HANDLE(dev); acpi_handle evt_handle; struct resource r; @@ -102,8 +108,6 @@ static acpi_status acpi_ged_request_interrupt(struct acpi_resource *ares, return AE_ERROR; } - dev_info(dev, "GED listening GSI %u @ IRQ %u\n", gsi, irq); - event = devm_kzalloc(dev, sizeof(*event), GFP_KERNEL); if (!event) return AE_ERROR; @@ -116,29 +120,58 @@ static acpi_status acpi_ged_request_interrupt(struct acpi_resource *ares, if (r.flags & IORESOURCE_IRQ_SHAREABLE) irqflags |= IRQF_SHARED; - if (devm_request_threaded_irq(dev, irq, NULL, acpi_ged_irq_handler, - irqflags, "ACPI:Ged", event)) { + if (request_threaded_irq(irq, NULL, acpi_ged_irq_handler, + irqflags, "ACPI:Ged", event)) { dev_err(dev, "failed to setup event handler for irq %u\n", irq); return AE_ERROR; } + dev_dbg(dev, "GED listening GSI %u @ IRQ %u\n", gsi, irq); + list_add_tail(&event->node, &geddev->event_list); return AE_OK; } static int ged_probe(struct platform_device *pdev) { + struct acpi_ged_device *geddev; acpi_status acpi_ret; + geddev = devm_kzalloc(&pdev->dev, sizeof(*geddev), GFP_KERNEL); + if (!geddev) + return -ENOMEM; + + geddev->dev = &pdev->dev; + INIT_LIST_HEAD(&geddev->event_list); acpi_ret = acpi_walk_resources(ACPI_HANDLE(&pdev->dev), "_CRS", - acpi_ged_request_interrupt, &pdev->dev); + acpi_ged_request_interrupt, geddev); if (ACPI_FAILURE(acpi_ret)) { dev_err(&pdev->dev, "unable to parse the _CRS record\n"); return -EINVAL; } + platform_set_drvdata(pdev, geddev); return 0; } +static void ged_shutdown(struct platform_device *pdev) +{ + struct acpi_ged_device *geddev = platform_get_drvdata(pdev); + struct acpi_ged_event *event, *next; + + list_for_each_entry_safe(event, next, &geddev->event_list, node) { + free_irq(event->irq, event); + list_del(&event->node); + dev_dbg(geddev->dev, "GED releasing GSI %u @ IRQ %u\n", + event->gsi, event->irq); + } +} + +static int ged_remove(struct platform_device *pdev) +{ + ged_shutdown(pdev); + return 0; +} + static const struct acpi_device_id ged_acpi_ids[] = { {"ACPI0013"}, {}, @@ -146,6 +179,8 @@ static const struct acpi_device_id ged_acpi_ids[] = { static struct platform_driver ged_driver = { .probe = ged_probe, + .remove = ged_remove, + .shutdown = ged_shutdown, .driver = { .name = MODULE_NAME, .acpi_match_table = ACPI_PTR(ged_acpi_ids), |