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platform/x86: dell/dell-rbtn: 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 dell-rbtn driver.

Fixes: 19ebacfb44 ("platform/x86: dell/dell-rbtn: 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/2276487.irdbgypaU6@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 16:05:07 +02:00 committed by Ilpo Järvinen
parent 08f29dc34d
commit 8a17c62b02
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GPG Key ID: 59AC4F6153E5CE31
1 changed files with 5 additions and 1 deletions
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6
drivers/platform/x86/dell/dell-rbtn.c
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@ -396,11 +396,15 @@ static void rbtn_cleanup(struct device *dev)
static int rbtn_probe(struct platform_device *pdev)
{
struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
struct rbtn_data *rbtn_data;
struct acpi_device *device;
enum rbtn_type type;
int ret = 0;
device = ACPI_COMPANION(&pdev->dev);
if (!device)
return -ENODEV;
type = rbtn_check(device);
if (type == RBTN_UNKNOWN) {
dev_info(&pdev->dev, "Unknown device type\n");