[SRU] [Karmic] fix volume hotkeys for Dell Studio 1557

[Jerone Young]

Impact:
	On the Dell Studio 1557 if you press any of the volume keys they will
not give a release and press infinitely.
https://bugs.launchpad.net/bugs/465250


Fix:
	Patch attached adds quirk to fix hotkeys for 2.6.31. 

	Though for 2.6.32 & upstream this fix is expected to go into udev.
Though Lucid has not pulled in a recent version supporting this
functionality.


Testcase:
	Pressing volume keys will not infinitely generate key presses.


Fix volume hotkeys for Dell Studio 1157 generating infinite key presses.

Signed-off-by: Jerone Young <jerone.young at canonical.com>

diff --git a/drivers/input/keyboard/atkbd.c b/drivers/input/keyboard/atkbd.c
index 950673f..af1744d 100644
--- a/drivers/input/keyboard/atkbd.c
+++ b/drivers/input/keyboard/atkbd.c
@@ -857,6 +857,14 @@ static unsigned int atkbd_dell_laptop_forced_release_keys[] = {
 };
 
 /*
+ * Dell Studio 1557 does not generate release keys for
+ * mute, volume up, & volume down
+ */
+static unsigned int atkdb_dell_studio_1157_force_relase_keys[] = {
+	0xa0, 0xae, 0xb0, -1U
+};
+
+/*
  * Perform fixup for HP system that doesn't generate release
  * for its video switch
  */
@@ -1542,6 +1550,15 @@ static struct dmi_system_id atkbd_dmi_quirk_table[] __initdata = {
 		.driver_data = atkbd_dell_laptop_forced_release_keys,
 	},
 	{
+		.ident = "Dell Stuido 1557",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"),
+		},
+		.callback = atkbd_setup_forced_release,
+		.driver_data = atkdb_dell_studio_1157_force_relase_keys,
+	},
+	{
 		.ident = "HP 2133",
 		.matches = {
 			DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),