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ACPI: TAD: Check AC wake capability before enabling wakeup

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ACPI_TAD_AC_WAKE is a non-zero bit definition, so testing the macro
itself is always true. As a result, every TAD device is initialized as
a system wakeup device, including RTC-only devices and devices whose
wake capability bits were cleared because _PRW is absent.

Test the capability value returned by _GCP instead. This keeps
RTC-only TAD devices usable without advertising a wakeup capability
that the firmware does not provide.

Fixes: 6c711fde3a ("ACPI: TAD: Support RTC without wakeup")
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Xu Rao <raoxu@uniontech.com>
Link: https://patch.msgid.link/961A84FF37B50665+20260625132903.2840457-1-raoxu@uniontech.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Xu Rao 2026-06-25 21:29:03 +08:00 committed by Rafael J. Wysocki
parent ad034486ad
commit 8522d806d8
1 changed files with 1 additions and 1 deletions
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2
drivers/acpi/acpi_tad.c
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@ -852,7 +852,7 @@ static int acpi_tad_probe(struct platform_device *pdev)
* runtime suspend. Everything else should be taken care of by the ACPI
* PM domain callbacks.
*/
if (ACPI_TAD_AC_WAKE) {
if (caps & ACPI_TAD_AC_WAKE) {
device_init_wakeup(dev, true);
dev_pm_set_driver_flags(dev, DPM_FLAG_SMART_SUSPEND |
DPM_FLAG_MAY_SKIP_RESUME);