]> git.baikalelectronics.ru Git - kernel.git/commit
ACPI / PNP: add two IDs to list for PNPACPI device enumeration
authorWitold Szczeponik <Witold.Szczeponik@gmx.net>
Fri, 1 May 2015 17:05:20 +0000 (19:05 +0200)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Mon, 4 May 2015 14:03:12 +0000 (16:03 +0200)
commita52a025bb18774204695ffc336dbaf15253babd3
tree4118d8e0c5a8ae94c3eb095f5d6a90f04606a5ac
parentcbecea48e1bc97dfc3f239ef42ed5094663b5822
ACPI / PNP: add two IDs to list for PNPACPI device enumeration

Commit 52ede7589b2b (ACPI / PNP: use device ID list for PNPACPI device
enumeration) changed the way how ACPI devices are enumerated and when
they are added to the PNP bus.

However, it broke the sound card support on (at least) a vintage
IBM ThinkPad 600E: with said commit applied, two of the necessary
"CSC01xx" devices are not added to the PNP bus and hence can not be
found during the initialization of the "snd-cs4236" module.  As a
consequence, loading "snd-cs4236" causes null pointer exceptions.
The attached patch fixes the problem end re-enables sound on the
IBM ThinkPad 600E.

Fixes: 52ede7589b2b (ACPI / PNP: use device ID list for PNPACPI device enumeration)
Signed-off-by: Witold Szczeponik <Witold.Szczeponik@gmx.net>
Cc: 3.16+ <stable@vger.kernel.org> # 3.16+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
drivers/acpi/acpi_pnp.c