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media: rc: get start time just before calling driver tx

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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 <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Sean Young 2018-02-12 09:00:28 -05:00 committed by Mauro Carvalho Chehab
parent c2837ad090
commit 2942273701
1 changed files with 2 additions and 2 deletions
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4
drivers/media/rc/lirc_dev.c
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@ -249,8 +249,6 @@ 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;
@ -343,6 +341,8 @@ 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;