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platform/x86: system76: 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 system76 driver.

Fixes: 80b8f68b94 ("platform/x86: system76: 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/2072699.usQuhbGJ8B@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 16:14:43 +02:00 committed by Ilpo Järvinen
parent f2ec69363f
commit 840bcd6bd5
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1 changed files with 5 additions and 1 deletions
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6
drivers/platform/x86/system76_acpi.c
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@ -674,10 +674,14 @@ static void system76_notify(acpi_handle handle, u32 event, void *context)
// Probe a System76 platform device
static int system76_probe(struct platform_device *pdev)
{
struct acpi_device *acpi_dev = ACPI_COMPANION(&pdev->dev);
struct acpi_device *acpi_dev;
struct system76_data *data;
int err;
acpi_dev = ACPI_COMPANION(&pdev->dev);
if (!acpi_dev)
return -ENODEV;
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;