From 6fe9363b15767babf3f5b9eb41a664de2cff4030 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Tue, 23 Jul 2019 23:34:11 +0300 Subject: [PATCH] platform/x86: acer-wmi: Switch to acpi_dev_get_first_match_dev() The acpi_dev_get_first_match_dev() helper will find and return an ACPI device pointer of the first registered device in the system by its HID. Use it instead of open coded variant. Cc: Chun-Yi Lee Signed-off-by: Andy Shevchenko --- drivers/platform/x86/acer-wmi.c | 49 ++++++----------------------------------- 1 file changed, 7 insertions(+), 42 deletions(-) diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c index 62b54e1..60c18f21 100644 --- a/drivers/platform/x86/acer-wmi.c +++ b/drivers/platform/x86/acer-wmi.c @@ -1881,52 +1881,17 @@ static int __init acer_wmi_enable_rf_button(void) return status; } -#define ACER_WMID_ACCEL_HID "BST0001" - -static acpi_status __init acer_wmi_get_handle_cb(acpi_handle ah, u32 level, - void *ctx, void **retval) -{ - struct acpi_device *dev; - - if (!strcmp(ctx, "SENR")) { - if (acpi_bus_get_device(ah, &dev)) - return AE_OK; - if (strcmp(ACER_WMID_ACCEL_HID, acpi_device_hid(dev))) - return AE_OK; - } else - return AE_OK; - - *(acpi_handle *)retval = ah; - - return AE_CTRL_TERMINATE; -} - -static int __init acer_wmi_get_handle(const char *name, const char *prop, - acpi_handle *ah) -{ - acpi_status status; - acpi_handle handle; - - BUG_ON(!name || !ah); - - handle = NULL; - status = acpi_get_devices(prop, acer_wmi_get_handle_cb, - (void *)name, &handle); - if (ACPI_SUCCESS(status) && handle) { - *ah = handle; - return 0; - } else { - return -ENODEV; - } -} - static int __init acer_wmi_accel_setup(void) { + struct acpi_device *adev; int err; - err = acer_wmi_get_handle("SENR", ACER_WMID_ACCEL_HID, &gsensor_handle); - if (err) - return err; + adev = acpi_dev_get_first_match_dev("BST0001", NULL, -1); + if (!adev) + return -ENODEV; + + gsensor_handle = acpi_device_handle(adev); + acpi_dev_put(adev); interface->capability |= ACER_CAP_ACCEL; -- 2.7.4