]> git.ipfire.org Git - thirdparty/kernel/linux.git/commit
ACPI: driver: Check ACPI_COMPANION() against NULL during probe
authorRafael J. Wysocki <rafael.j.wysocki@intel.com>
Fri, 8 May 2026 18:04:33 +0000 (20:04 +0200)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Mon, 11 May 2026 16:50:06 +0000 (18:50 +0200)
commite4865a56d013e86e46ea6acea15bb6eae01898ff
tree7947b14d7a0b69f45abb717c296cf8d955d9d9db
parent5d6919055dec134de3c40167a490f33c74c12581
ACPI: driver: Check ACPI_COMPANION() against NULL during probe

Since 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(),
platform drivers that rely on the existence of a device's ACPI companion
object should verify its presence.

Accordingly, add requisite ACPI_COMPANION() or ACPI_HANDLE() checks
against NULL to 13 platform drivers handling core ACPI devices.

Also change the value returned by the ACPI thermal zone driver when
the device's ACPI companion is not present to -ENODEV for consistency
with the other drivers.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/4516068.ejJDZkT8p0@rafael.j.wysocki
Cc: 7.0+ <stable@vger.kernel.org> # 7.0+
14 files changed:
drivers/acpi/ac.c
drivers/acpi/acpi_pad.c
drivers/acpi/acpi_tad.c
drivers/acpi/battery.c
drivers/acpi/button.c
drivers/acpi/ec.c
drivers/acpi/hed.c
drivers/acpi/nfit/core.c
drivers/acpi/pfr_telemetry.c
drivers/acpi/pfr_update.c
drivers/acpi/sbs.c
drivers/acpi/sbshc.c
drivers/acpi/thermal.c
drivers/acpi/tiny-power-button.c