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media: dvb-usb-v2/gl861: use usleep_range() for short delay 

As the kernel doc "timers-howto.txt" reads,
short delay with msleep() can take much longer.
In a case of raspbery-pi platform where CONFIG_HZ_100 was set,
it actually affected the init of Friio devices
since it issues lots of i2c transactions with short delay.

Signed-off-by: Akihiro Tsukada <tskd08@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
hifive-unleashed-5.1
Akihiro Tsukada 2018-04-08 13:21:37 -04:00 committed by Mauro Carvalho Chehab
parent 17459727ba
commit 87360e68b3
1 changed files with 1 additions and 1 deletions
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2
drivers/media/usb/dvb-usb-v2/gl861.c
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@ -43,7 +43,7 @@ static int gl861_i2c_msg(struct dvb_usb_device *d, u8 addr,
return -EINVAL;
}
msleep(1); /* avoid I2C errors */
usleep_range(1000, 2000); /* avoid I2C errors */
return usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), req, type,
value, index, rbuf, rlen, 2000);