From: Akihiro Tsukada Date: Sun, 8 Apr 2018 17:21:37 +0000 (-0400) Subject: media: dvb-usb-v2/gl861: use usleep_range() for short delay X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=87360e68b33f12c9e5b08636a3e349f851eba706;p=openwrt%2Fstaging%2Fblogic.git 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 Signed-off-by: Mauro Carvalho Chehab --- 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);