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platform/x86: panasonic-laptop: 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
platform/x86 panasonic-laptop driver.

Fixes: de6837243a ("platform/x86: panasonic-laptop: Convert ACPI driver to a platform one")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/3353471.5fSG56mABF@rafael.j.wysocki
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Rafael J. Wysocki 2026-05-12 16:13:13 +02:00 committed by Ilpo Järvinen
parent 7e169326c2
commit f15b0a3043
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1 changed files with 5 additions and 1 deletions
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6
drivers/platform/x86/panasonic-laptop.c
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@ -981,11 +981,15 @@ static int acpi_pcc_hotkey_resume(struct device *dev)
static int acpi_pcc_hotkey_probe(struct platform_device *pdev)
{
struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
struct backlight_properties props;
struct acpi_device *device;
struct pcc_acpi *pcc;
int num_sifr, result;
device = ACPI_COMPANION(&pdev->dev);
if (!device)
return -ENODEV;
num_sifr = acpi_pcc_get_sqty(device);
/*