Hi, all, I found a bug that linux/acpi may execute notify handler that has been removed. When a system notify(0~0x7f) is received, linux/acpi will first invoke the generic system notify handler (acpi_bus_notify) and then invoke the per-device notify handler if present. In my case, I add some code in acpi_bus_notify for battery hotplug support, so that the generic system notify handler will remove the battery device, including the per-device notify handler acpi_battery_notify() when receiving notification ACPI_NOTIFY_EJECT_REQUEST. But linux/acpi invokes the per-device notify handler soon and this breaks the system. Further more, device hot-removal is not the only case to encounter this bug. For example, linux/acpi receives a notification and adds it in the workqueue, and then the driver(notify handler) is removed before kacpid_notify invoke it... Attachment is the patch for battery hotplug support. Any ideas about this bug? Thanks, Rui - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
