3 files changed, 29 insertions, 34 deletions

diff --git a/drivers/media/rc/ir-lirc-codec.c b/drivers/media/rc/ir-lirc-codec.c
index d2fd064474aa..6ad4a0770613 100644
--- a/drivers/media/rc/ir-lirc-codec.c
+++ b/drivers/media/rc/ir-lirc-codec.c
@@ -107,6 +107,12 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf,
 	unsigned int *txbuf; /* buffer with values to transmit */
 	ssize_t ret = -EINVAL;
 	size_t count;
+	ktime_t start;
+	s64 towait;
+	unsigned int duration = 0; /* signal duration in us */
+	int i;
+
+	start = ktime_get();
 
 	lirc = lirc_get_pdata(file);
 	if (!lirc)
@@ -129,11 +135,30 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf,
 		goto out;
 	}
 
-	if (dev->tx_ir)
-		ret = dev->tx_ir(dev, txbuf, count);
+	if (!dev->tx_ir) {
+		ret = -ENOSYS;
+		goto out;
+	}
+
+	ret = dev->tx_ir(dev, txbuf, (u32)n);
+	if (ret < 0)
+		goto out;
+
+	for (i = 0; i < ret; i++)
+		duration += txbuf[i];
 
-	if (ret > 0)
-		ret *= sizeof(unsigned);
+	ret *= sizeof(unsigned int);
+
+	/*
+	 * The lircd gap calculation expects the write function to
+	 * wait for the actual IR signal to be transmitted before
+	 * returning.
+	 */
+	towait = ktime_us_delta(ktime_add_us(start, duration), ktime_get());
+	if (towait > 0) {
+		set_current_state(TASK_INTERRUPTIBLE);
+		schedule_timeout(usecs_to_jiffies(towait));
+	}
 
 out:
 	kfree(txbuf);
diff --git a/drivers/media/rc/mceusb.c b/drivers/media/rc/mceusb.c
index d289fd42729f..a5c6c1c2af82 100644
--- a/drivers/media/rc/mceusb.c
+++ b/drivers/media/rc/mceusb.c
@@ -791,10 +791,6 @@ static int mceusb_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count)
 	int i, ret = 0;
 	int cmdcount = 0;
 	unsigned char *cmdbuf; /* MCE command buffer */
-	long signal_duration = 0; /* Singnal length in us */
-	struct timeval start_time, end_time;
-
-	do_gettimeofday(&start_time);
 
 	cmdbuf = kzalloc(sizeof(unsigned) * MCE_CMDBUF_SIZE, GFP_KERNEL);
 	if (!cmdbuf)
@@ -807,7 +803,6 @@ static int mceusb_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count)
 
 	/* Generate mce packet data */
 	for (i = 0; (i < count) && (cmdcount < MCE_CMDBUF_SIZE); i++) {
-		signal_duration += txbuf[i];
 		txbuf[i] = txbuf[i] / MCE_TIME_UNIT;
 
 		do { /* loop to support long pulses/spaces > 127*50us=6.35ms */
@@ -850,19 +845,6 @@ static int mceusb_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count)
 	/* Transmit the command to the mce device */
 	mce_async_out(ir, cmdbuf, cmdcount);
 
-	/*
-	 * The lircd gap calculation expects the write function to
-	 * wait the time it takes for the ircommand to be sent before
-	 * it returns.
-	 */
-	do_gettimeofday(&end_time);
-	signal_duration -= (end_time.tv_usec - start_time.tv_usec) +
-			   (end_time.tv_sec - start_time.tv_sec) * 1000000;
-
-	/* delay with the closest number of ticks */
-	set_current_state(TASK_INTERRUPTIBLE);
-	schedule_timeout(usecs_to_jiffies(signal_duration));
-
 out:
 	kfree(cmdbuf);
 	return ret ? ret : count;
diff --git a/drivers/media/rc/rc-loopback.c b/drivers/media/rc/rc-loopback.c
index fae1615e0ff2..f9be68132c67 100644
--- a/drivers/media/rc/rc-loopback.c
+++ b/drivers/media/rc/rc-loopback.c
@@ -105,18 +105,9 @@ static int loop_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count)
 {
 	struct loopback_dev *lodev = dev->priv;
 	u32 rxmask;
-	unsigned total_duration = 0;
 	unsigned i;
 	DEFINE_IR_RAW_EVENT(rawir);
 
-	for (i = 0; i < count; i++)
-		total_duration += abs(txbuf[i]);
-
-	if (total_duration == 0) {
-		dprintk("invalid tx data, total duration zero\n");
-		return -EINVAL;
-	}
-
 	if (lodev->txcarrier < lodev->rxcarriermin ||
 	    lodev->txcarrier > lodev->rxcarriermax) {
 		dprintk("ignoring tx, carrier out of range\n");
@@ -148,9 +139,6 @@ static int loop_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count)
 	ir_raw_event_handle(dev);
 
 out:
-	/* Lirc expects this function to take as long as the total duration */
-	set_current_state(TASK_INTERRUPTIBLE);
-	schedule_timeout(usecs_to_jiffies(total_duration));
 	return count;
 }