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Message-ID: <2057157.usQuhbGJ8B@rafael.j.wysocki>
Date: Wed, 15 Oct 2025 16:04:39 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Linux PM <linux-pm@...r.kernel.org>
Cc: Jonathan Cameron <jonathan.cameron@...wei.com>,
Takashi Iwai <tiwai@...e.de>, LKML <linux-kernel@...r.kernel.org>,
Linux PCI <linux-pci@...r.kernel.org>,
Alex Williamson <alex.williamson@...hat.com>,
Bjorn Helgaas <helgaas@...nel.org>, Zhang Qilong <zhangqilong3@...wei.com>,
Ulf Hansson <ulf.hansson@...aro.org>, Frank Li <Frank.Li@....com>,
Dhruva Gole <d-gole@...com>,
Mika Westerberg <mika.westerberg@...ux.intel.com>,
Linux ACPI <linux-acpi@...r.kernel.org>
Subject: [PATCH v1 3/3] ACPI: TAD: Improve runtime PM using guard macros
From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Use guard pm_runtime_active_try to simplify runtime PM cleanup and
implement runtime resume error handling in multiple places.
Also use guard pm_runtime_noresume to simplify acpi_tad_remove().
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
drivers/acpi/acpi_tad.c | 45 +++++++++++++--------------------------------
1 file changed, 13 insertions(+), 32 deletions(-)
--- a/drivers/acpi/acpi_tad.c
+++ b/drivers/acpi/acpi_tad.c
@@ -90,12 +90,9 @@ static int acpi_tad_set_real_time(struct
args[0].buffer.pointer = (u8 *)rt;
args[0].buffer.length = sizeof(*rt);
- pm_runtime_get_sync(dev);
+ PM_RUNTIME_ACQUIRE_OR_FAIL(dev, -ENXIO);
status = acpi_evaluate_integer(handle, "_SRT", &arg_list, &retval);
-
- pm_runtime_put_sync(dev);
-
if (ACPI_FAILURE(status) || retval)
return -EIO;
@@ -111,12 +108,9 @@ static int acpi_tad_get_real_time(struct
acpi_status status;
int ret = -EIO;
- pm_runtime_get_sync(dev);
+ PM_RUNTIME_ACQUIRE_OR_FAIL(dev, -ENXIO);
status = acpi_evaluate_object(handle, "_GRT", NULL, &output);
-
- pm_runtime_put_sync(dev);
-
if (ACPI_FAILURE(status))
goto out_free;
@@ -266,12 +260,9 @@ static int acpi_tad_wake_set(struct devi
args[0].integer.value = timer_id;
args[1].integer.value = value;
- pm_runtime_get_sync(dev);
+ PM_RUNTIME_ACQUIRE_OR_FAIL(dev, -ENXIO);
status = acpi_evaluate_integer(handle, method, &arg_list, &retval);
-
- pm_runtime_put_sync(dev);
-
if (ACPI_FAILURE(status) || retval)
return -EIO;
@@ -314,12 +305,9 @@ static ssize_t acpi_tad_wake_read(struct
args[0].integer.value = timer_id;
- pm_runtime_get_sync(dev);
+ PM_RUNTIME_ACQUIRE_OR_FAIL(dev, -ENXIO);
status = acpi_evaluate_integer(handle, method, &arg_list, &retval);
-
- pm_runtime_put_sync(dev);
-
if (ACPI_FAILURE(status))
return -EIO;
@@ -370,12 +358,9 @@ static int acpi_tad_clear_status(struct
args[0].integer.value = timer_id;
- pm_runtime_get_sync(dev);
+ PM_RUNTIME_ACQUIRE_OR_FAIL(dev, -ENXIO);
status = acpi_evaluate_integer(handle, "_CWS", &arg_list, &retval);
-
- pm_runtime_put_sync(dev);
-
if (ACPI_FAILURE(status) || retval)
return -EIO;
@@ -411,12 +396,9 @@ static ssize_t acpi_tad_status_read(stru
args[0].integer.value = timer_id;
- pm_runtime_get_sync(dev);
+ PM_RUNTIME_ACQUIRE_OR_FAIL(dev, -ENXIO);
status = acpi_evaluate_integer(handle, "_GWS", &arg_list, &retval);
-
- pm_runtime_put_sync(dev);
-
if (ACPI_FAILURE(status))
return -EIO;
@@ -571,16 +553,15 @@ static void acpi_tad_remove(struct platf
sysfs_remove_group(&dev->kobj, &acpi_tad_attr_group);
- pm_runtime_get_noresume(dev);
-
- acpi_tad_disable_timer(dev, ACPI_TAD_AC_TIMER);
- acpi_tad_clear_status(dev, ACPI_TAD_AC_TIMER);
- if (dd->capabilities & ACPI_TAD_DC_WAKE) {
- acpi_tad_disable_timer(dev, ACPI_TAD_DC_TIMER);
- acpi_tad_clear_status(dev, ACPI_TAD_DC_TIMER);
+ scoped_guard(pm_runtime_noresume, dev) {
+ acpi_tad_disable_timer(dev, ACPI_TAD_AC_TIMER);
+ acpi_tad_clear_status(dev, ACPI_TAD_AC_TIMER);
+ if (dd->capabilities & ACPI_TAD_DC_WAKE) {
+ acpi_tad_disable_timer(dev, ACPI_TAD_DC_TIMER);
+ acpi_tad_clear_status(dev, ACPI_TAD_DC_TIMER);
+ }
}
- pm_runtime_put_noidle(dev);
pm_runtime_suspend(dev);
pm_runtime_disable(dev);
acpi_remove_cmos_rtc_space_handler(handle);
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