[PATCH 5/5] media: rc: get start time just before calling driver tx

[Sean Young]

The current code gets the start time before copying the IR from
userspace (could cause page faults) and encoding IR. This means
that the gap calculation could be off.

Signed-off-by: Sean Young <s...@mess.org>
---
 drivers/media/rc/lirc_dev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/rc/lirc_dev.c b/drivers/media/rc/lirc_dev.c
index b25dcff71791..30af7ba9e5ce 100644
--- a/drivers/media/rc/lirc_dev.c
+++ b/drivers/media/rc/lirc_dev.c
@@ -247,8 +247,6 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const 
char __user *buf,
                goto out_unlock;
        }
 
-       start = ktime_get();
-
        if (!dev->tx_ir) {
                ret = -EINVAL;
                goto out_unlock;
@@ -341,6 +339,8 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const 
char __user *buf,
                duration += txbuf[i];
        }
 
+       start = ktime_get();
+
        ret = dev->tx_ir(dev, txbuf, count);
        if (ret < 0)
                goto out_kfree;
-- 
2.14.3