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| author | Akihiro Tsukada <tskd08@gmail.com> | 2018-04-08 13:21:37 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-05-05 07:15:09 -0400 |
| commit | 87360e68b33f12c9e5b08636a3e349f851eba706 (patch) | |
| tree | f233e924d5e39c5d5c91606b4ca4351c4230baaf /drivers | |
| parent | 17459727ba52f2566c19b9621b9205a0910ec161 (diff) | |
| download | linux-87360e68b33f12c9e5b08636a3e349f851eba706.tar.bz2 | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/usb/dvb-usb-v2/gl861.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/usb/dvb-usb-v2/gl861.c b/drivers/media/usb/dvb-usb-v2/gl861.c index b1b09c547861..b1dbb9af380b 100644 --- a/drivers/media/usb/dvb-usb-v2/gl861.c +++ b/drivers/media/usb/dvb-usb-v2/gl861.c @@ -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); |