Staging: iio: adc: Refine delay computation

As per comment in function ad7280_delay, conversion delay may take up
to 250us. We cannot rely on msleep for this because it may sleep longer
than intended time for values less than 20ms, so use usleep_range instead.

Problem detected using checkpatch.pl.

Signed-off-by: Vaishali Thakkar <vthakkar1994@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/iio/adc/ad7280a.c b/drivers/staging/iio/adc/ad7280a.c
index d215edf..4d48707 100644 (file)
--- a/drivers/staging/iio/adc/ad7280a.c
+++ b/drivers/staging/iio/adc/ad7280a.c
@@ -188,7 +188,7 @@ static void ad7280_delay(struct ad7280_state *st)
        if (st->readback_delay_us < 50)
                udelay(st->readback_delay_us);
        else
-               msleep(1);
+               usleep_range(250, 500);
 }
 
 static int __ad7280_read32(struct ad7280_state *st, unsigned *val)