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hwmon: (acpi_power_meter) Check ACPI_COMPANION() against NULL

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Every platform driver can be forced to match a device that doesn't match
its list of device IDs because of device_match_driver_override(), so
platform drivers that rely on the existence of a device's ACPI companion
object need to verify its presence.

Accordingly, add a requisite ACPI_COMPANION() check against NULL to the
acpi_power_meter hwmon driver.

Fixes: afc6c4aede ("hwmon: (acpi_power_meter) Convert ACPI driver to a platform one")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/5068745.GXAFRqVoOG@rafael.j.wysocki
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Rafael J. Wysocki 2026-05-11 21:54:51 +02:00 committed by Guenter Roeck
parent 5d6919055d
commit 793d2a057f
1 changed files with 5 additions and 1 deletions
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6
drivers/hwmon/acpi_power_meter.c
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@ -884,10 +884,14 @@ static void acpi_power_meter_notify(acpi_handle handle, u32 event, void *data)
static int acpi_power_meter_probe(struct platform_device *pdev)
{
struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
struct acpi_power_meter_resource *resource;
struct acpi_device *device;
int res;
device = ACPI_COMPANION(&pdev->dev);
if (!device)
return -ENODEV;
resource = kzalloc_obj(*resource);
if (!resource)
return -ENOMEM;