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authorSean Young <sean@mess.org>2012-08-13 08:59:47 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-08-13 16:19:12 -0300
commitb83bfd1b0127b0963fcac39280280e365e7e04d8 (patch)
tree3a7d76ffb8844af1ce9ffb5299d6f2726699c3e5 /drivers/media/rc/fintek-cir.c
parent0938069fa08970f1c898970c1331a029efe9a1ce (diff)
[media] rc: do not wake up rc thread unless there is something to do
The TechnoTrend USB IR Receiver sends 125 ISO URBs per second, even when there is no IR activity. Reduce the number of wake ups from the other drivers too. This saves about 0.25ms/s on a 2.4GHz Core 2 according to powertop. Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/rc/fintek-cir.c')
-rw-r--r--drivers/media/rc/fintek-cir.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/media/rc/fintek-cir.c b/drivers/media/rc/fintek-cir.c
index ab30c64f8124..52fd7696b1ba 100644
--- a/drivers/media/rc/fintek-cir.c
+++ b/drivers/media/rc/fintek-cir.c
@@ -295,6 +295,7 @@ static void fintek_process_rx_ir_data(struct fintek_dev *fintek)
{
DEFINE_IR_RAW_EVENT(rawir);
u8 sample;
+ bool event = false;
int i;
for (i = 0; i < fintek->pkts; i++) {
@@ -332,7 +333,9 @@ static void fintek_process_rx_ir_data(struct fintek_dev *fintek)
fit_dbg("Storing %s with duration %d",
rawir.pulse ? "pulse" : "space",
rawir.duration);
- ir_raw_event_store_with_filter(fintek->rdev, &rawir);
+ if (ir_raw_event_store_with_filter(fintek->rdev,
+ &rawir))
+ event = true;
break;
}
@@ -342,8 +345,10 @@ static void fintek_process_rx_ir_data(struct fintek_dev *fintek)
fintek->pkts = 0;
- fit_dbg("Calling ir_raw_event_handle");
- ir_raw_event_handle(fintek->rdev);
+ if (event) {
+ fit_dbg("Calling ir_raw_event_handle");
+ ir_raw_event_handle(fintek->rdev);
+ }
}
/* copy data from hardware rx register into driver buffer */

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