From 29422737017b866d4a51014cc7522fa3a99e8852 Mon Sep 17 00:00:00 2001 From: Sean Young Date: Mon, 12 Feb 2018 09:00:28 -0500 Subject: media: rc: get start time just before calling driver tx 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 Signed-off-by: Mauro Carvalho Chehab --- drivers/media/rc/lirc_dev.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/media/rc/lirc_dev.c') diff --git a/drivers/media/rc/lirc_dev.c b/drivers/media/rc/lirc_dev.c index fd3860d50034..da3b5c095a59 100644 --- a/drivers/media/rc/lirc_dev.c +++ b/drivers/media/rc/lirc_dev.c @@ -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; -- cgit v1.2.3-59-g8ed1b