rt2800: replace msleep() with usleep_range() on channel switch

msleep(1) can sleep much more time then requested 1ms, this is not good
on channel switch, which we want to be performed fast (i.e. to make scan
faster). Replace msleep() with usleep_range(), which has much smaller
maximum sleeping time boundary.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
index 13211c8854cc042e14774db4226dc626fc516c2a..5436cdb079375c2d5cdc84e870db35e7f255ccb5 100644 (file)
--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
@@ -2110,7 +2110,9 @@ static void rt2800_config_channel_rf3xxx(struct rt2x00_dev *rt2x00dev,
        rt2800_rfcsr_read(rt2x00dev, 30, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR30_RF_CALIBRATION, 1);
        rt2800_rfcsr_write(rt2x00dev, 30, rfcsr);
-       msleep(1);
+
+       usleep_range(1000, 1500);
+
        rt2x00_set_field8(&rfcsr, RFCSR30_RF_CALIBRATION, 0);
        rt2800_rfcsr_write(rt2x00dev, 30, rfcsr);
 }
@@ -3442,7 +3444,7 @@ static void rt2800_config_channel(struct rt2x00_dev *rt2x00dev,
                }
        }
 
-       msleep(1);
+       usleep_range(1000, 1500);
 
        /*
         * Clear channel statistic counters