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[3.16.y-ckt,085/129] ACPI / PNP: add two IDs to list for PNPACPI device enumeration

Message ID 1432285114-9254-86-git-send-email-luis.henriques@canonical.com
State New
Headers show

Commit Message

Luis Henriques May 22, 2015, 8:57 a.m. UTC 
3.16.7-ckt12 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Witold Szczeponik <Witold.Szczeponik@gmx.net>

commit 622532bb2fad8fe342fb685727ae0be566f6be5d upstream.

Commit eec15edbb0e1 (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: eec15edbb0e1 (ACPI / PNP: use device ID list for PNPACPI device enumeration)
Signed-off-by: Witold Szczeponik <Witold.Szczeponik@gmx.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/acpi/acpi_pnp.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/drivers/acpi/acpi_pnp.c b/drivers/acpi/acpi_pnp.c
index 4ddb0dca56f6..fa13db682309 100644
--- a/drivers/acpi/acpi_pnp.c
+++ b/drivers/acpi/acpi_pnp.c
@@ -309,6 +309,8 @@  static const struct acpi_device_id acpi_pnp_device_ids[] = {
 	{"PNPb006"},
 	/* cs423x-pnpbios */
 	{"CSC0100"},
+	{"CSC0103"},
+	{"CSC0110"},
 	{"CSC0000"},
 	{"GIM0100"},		/* Guillemot Turtlebeach something appears to be cs4232 compatible */
 	/* es18xx-pnpbios */