diff options
| -rw-r--r-- | drivers/acpi/scan.c | 31 | ||||
| -rw-r--r-- | drivers/acpi/utils.c | 43 | ||||
| -rw-r--r-- | include/acpi/acpi_bus.h | 2 |
3 files changed, 51 insertions, 25 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index ada0b4cf2ba5..4c25c3b7ef81 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -193,8 +193,6 @@ static acpi_status acpi_bus_online_companions(acpi_handle handle, u32 lvl, static int acpi_scan_hot_remove(struct acpi_device *device) { acpi_handle handle = device->handle; - struct acpi_object_list arg_list; - union acpi_object arg; struct device *errdev; acpi_status status; unsigned long long sta; @@ -257,32 +255,15 @@ static int acpi_scan_hot_remove(struct acpi_device *device) put_device(&device->dev); device = NULL; - if (acpi_has_method(handle, "_LCK")) { - arg_list.count = 1; - arg_list.pointer = &arg; - arg.type = ACPI_TYPE_INTEGER; - arg.integer.value = 0; - acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); - } - - arg_list.count = 1; - arg_list.pointer = &arg; - arg.type = ACPI_TYPE_INTEGER; - arg.integer.value = 1; - + acpi_evaluate_lck(handle, 0); /* * TBD: _EJD support. */ - status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); - if (ACPI_FAILURE(status)) { - if (status == AE_NOT_FOUND) { - return -ENODEV; - } else { - acpi_handle_warn(handle, "Eject failed (0x%x)\n", - status); - return -EIO; - } - } + status = acpi_evaluate_ej0(handle); + if (status == AE_NOT_FOUND) + return -ENODEV; + else if (ACPI_FAILURE(status)) + return -EIO; /* * Verify if eject was indeed successful. If not, log an error diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c index 87b85882b5df..552248b0005b 100644 --- a/drivers/acpi/utils.c +++ b/drivers/acpi/utils.c @@ -522,3 +522,46 @@ acpi_status acpi_execute_simple_method(acpi_handle handle, char *method, return acpi_evaluate_object(handle, method, &arg_list, NULL); } EXPORT_SYMBOL(acpi_execute_simple_method); + +/** + * acpi_evaluate_ej0: Evaluate _EJ0 method for hotplug operations + * @handle: ACPI device handle + * + * Evaluate device's _EJ0 method for hotplug operations. + */ +acpi_status acpi_evaluate_ej0(acpi_handle handle) +{ + acpi_status status; + + status = acpi_execute_simple_method(handle, "_EJ0", 1); + if (status == AE_NOT_FOUND) + acpi_handle_warn(handle, "No _EJ0 support for device\n"); + else if (ACPI_FAILURE(status)) + acpi_handle_warn(handle, "Eject failed (0x%x)\n", status); + + return status; +} + +/** + * acpi_evaluate_lck: Evaluate _LCK method to lock/unlock device + * @handle: ACPI device handle + * @lock: lock device if non-zero, otherwise unlock device + * + * Evaluate device's _LCK method if present to lock/unlock device + */ +acpi_status acpi_evaluate_lck(acpi_handle handle, int lock) +{ + acpi_status status; + + status = acpi_execute_simple_method(handle, "_LCK", !!lock); + if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { + if (lock) + acpi_handle_warn(handle, + "Locking device failed (0x%x)\n", status); + else + acpi_handle_warn(handle, + "Unlocking device failed (0x%x)\n", status); + } + + return status; +} diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index e3862587b9de..f499157b04e8 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -60,6 +60,8 @@ acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld bool acpi_has_method(acpi_handle handle, char *name); acpi_status acpi_execute_simple_method(acpi_handle handle, char *method, u64 arg); +acpi_status acpi_evaluate_ej0(acpi_handle handle); +acpi_status acpi_evaluate_lck(acpi_handle handle, int lock); #ifdef CONFIG_ACPI |