Unverified Commit ab743c6d authored by Rafael J. Wysocki's avatar Rafael J. Wysocki Committed by Ilpo Järvinen
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platform/x86: fujitsu-tablet: Check ACPI_COMPANION() against NULL 



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 requisite ACPI_COMPANION() checks against NULL to the
platform/x86 fujitsu-tablet driver.

Fixes: bd13b265 ("platform/x86: fujitsu-tablet: Convert ACPI driver to a platform one")
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/10861611.nUPlyArG6x@rafael.j.wysocki


Reviewed-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
parent e99829a1

drivers/platform/x86/fujitsu-tablet.c

+5 −1
Original line number Diff line number Diff line
@@ -445,10 +445,14 @@ static acpi_status fujitsu_walk_resources(struct acpi_resource *res, void *data) 


static int acpi_fujitsu_probe(struct platform_device *pdev)

{

	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);

	struct acpi_device *adev;

	acpi_status status;

	int error;



	adev = ACPI_COMPANION(&pdev->dev);

	if (!adev)

		return -ENODEV;



	status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS,

			fujitsu_walk_resources, NULL);

	if (ACPI_FAILURE(status) || !fujitsu.irq || !fujitsu.io_base)