tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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ACPI: bus: Fix MFD child automatic modprobe issue

MFD child devices sharing parent's ACPI Companion fails to probe as
acpi_companion_match() returns incompatible ACPI Companion handle for
binding with the check for pnp.type.backlight added recently. Remove this
pnp.type.backlight check in acpi_companion_match() to fix the automatic
modprobe issue.

Fixes: 7a7a7ed5f8bdb ("ACPI: scan: Register platform devices for backlight device objects")
Signed-off-by: Pratap Nirujogi <pratap.nirujogi@amd.com>
Link: https://patch.msgid.link/20260318034842.1216536-1-pratap.nirujogi@amd.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

authored by

Pratap Nirujogi and committed by
Rafael J. Wysocki e7648ffe f338e773

-3
-3
drivers/acpi/bus.c
··· 818 818 if (list_empty(&adev->pnp.ids)) 819 819 return NULL; 820 820 821 - if (adev->pnp.type.backlight) 822 - return adev; 823 - 824 821 return acpi_primary_dev_companion(adev, dev); 825 822 } 826 823