From d730192ff0246356a2d7e63ff5bd501060670eec Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Sat, 6 Apr 2024 13:40:52 +0200 Subject: ACPI: scan: Do not increase dep_unmet for already met dependencies On the Toshiba Encore WT10-A tablet the BATC battery ACPI device depends on 3 other devices: Name (_DEP, Package (0x03) // _DEP: Dependencies { I2C1, GPO2, GPO0 }) acpi_scan_check_dep() adds all 3 of these to the acpi_dep_list and then before an acpi_device is created for the BATC handle (and thus before acpi_scan_dep_init() runs) acpi_scan_clear_dep() gets called for both GPIO depenencies, with free_when_met not set for the dependencies. Since there is no adev for BATC yet, there also is no dep_unmet to decrement. The only result of acpi_scan_clear_dep() in this case is dep->met getting set. Soon after acpi_scan_clear_dep() has been called for the GPIO dependencies the acpi_device gets created for the BATC handle and acpi_scan_dep_init() runs, this sees 3 dependencies on the acpi_dep_list and initializes unmet_dep to 3. Later when the dependency for I2C1 is met unmet_dep becomes 2, but since the 2 GPIO deps where already met it never becomes 0 causing battery monitoring to not work. Fix this by modifying acpi_scan_dep_init() to not increase dep_met for dependencies which have already been marked as being met. Fixes: 3ba12d8de3fa ("ACPI: scan: Reduce overhead related to devices with dependencies") Signed-off-by: Hans de Goede Cc: 6.5+ # 6.5+ Signed-off-by: Rafael J. Wysocki --- drivers/acpi/scan.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 7c157bf92695..d1464324de95 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1843,7 +1843,8 @@ static void acpi_scan_dep_init(struct acpi_device *adev) if (dep->honor_dep) adev->flags.honor_deps = 1; - adev->dep_unmet++; + if (!dep->met) + adev->dep_unmet++; } } } -- cgit v1.2.3