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authorKrzysztof Kosiński <tweenk.pl@gmail.com>2009-03-19 23:22:31 +0100
committerLen Brown <len.brown@intel.com>2009-04-03 18:03:27 +0200
commit07de5bdb7bad607e29dc17c345717403a76a334c (patch)
tree944d7898e8fb41ce2f30836d64264f1572ebbc1b /drivers/platform/x86/tc1100-wmi.c
parentACPI: cap off P-state transition latency from buggy BIOSes (diff)
downloadlinux-07de5bdb7bad607e29dc17c345717403a76a334c.tar.xz
linux-07de5bdb7bad607e29dc17c345717403a76a334c.zip
tc1100-wmi: Fix state reporting
The tc1100-wmi driver should print the current states of wireless LAN and jogdial brightness control when "cat /sys/devices/platform/tc1100-wmi/wireless" and "cat /sys/devices/platform/tc1100-wmi/jogdial" are executed, respectively. What actually happens is that both of those commands print 0 regardless of the hardware state. The cause is that wmi_query_block returns an ACPI_TYPE_INTEGER rather than ACPI_TYPE_BUFFER as the driver assumes. Additionally, the driver intends to return a jogdial state that is inverted with respect to the commands required to set it (e.g. it intends to return 1 after the jogdial file was written with 0). This patch fixes both of those issues - the commands to query the state now work, and should return the same state that was written. http://bugzilla.kernel.org/show_bug.cgi?id=12286 Signed-off-by: Krzysztof Kosiński <tweenk.pl@gmail.com> Acked-by: Carlos Corbacho <carlos@strangeworlds.co.uk> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/platform/x86/tc1100-wmi.c')
-rw-r--r--drivers/platform/x86/tc1100-wmi.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/platform/x86/tc1100-wmi.c b/drivers/platform/x86/tc1100-wmi.c
index b4a4aa9ee482..44166003d4ef 100644
--- a/drivers/platform/x86/tc1100-wmi.c
+++ b/drivers/platform/x86/tc1100-wmi.c
@@ -94,9 +94,8 @@ static int get_state(u32 *out, u8 instance)
return -ENODEV;
obj = (union acpi_object *) result.pointer;
- if (obj && obj->type == ACPI_TYPE_BUFFER &&
- obj->buffer.length == sizeof(u32)) {
- tmp = *((u32 *) obj->buffer.pointer);
+ if (obj && obj->type == ACPI_TYPE_INTEGER) {
+ tmp = obj->integer.value;
} else {
tmp = 0;
}
@@ -109,7 +108,7 @@ static int get_state(u32 *out, u8 instance)
*out = (tmp == 3) ? 1 : 0;
return 0;
case TC1100_INSTANCE_JOGDIAL:
- *out = (tmp == 1) ? 1 : 0;
+ *out = (tmp == 1) ? 0 : 1;
return 0;
default:
return -ENODEV;