From: Krzysztof Kosiński Date: Thu, 19 Mar 2009 22:22:31 +0000 (+0100) Subject: tc1100-wmi: Fix state reporting X-Git-Tag: firefly_0821_release~14774^2~4^2~8 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=07de5bdb7bad607e29dc17c345717403a76a334c;p=firefly-linux-kernel-4.4.55.git 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 Acked-by: Carlos Corbacho Signed-off-by: Len Brown --- 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;