From: Xenia Ragiadakou Date: Sun, 23 Jun 2013 03:15:18 +0000 (+0300) Subject: staging: rtl8192u: replace msleep(1) with usleep_range() in r819xU_phy.c X-Git-Tag: firefly_0821_release~176^2~5845^2~12 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=26f3561db708efa91e005b8837fb3e49c17b424f;p=firefly-linux-kernel-4.4.55.git staging: rtl8192u: replace msleep(1) with usleep_range() in r819xU_phy.c This patch fixes the following checkpatch warning: WARNING: msleep < 20ms can sleep for up to 20ms The implementation of msleep() is based on jiffies timeout subsystem. Hence, its resolution is constrained by the value of HZ tick rate. When HZ variable is configured to 100, the jiffies variable is updated every 10 ms, so a timeout of 1ms cannot be met using jiffies (it will be rounded up to 10ms). This patch replaces msleep(1) with usleep_range(1000, 1000). usleep_range() uses hrtimers subsystem which is not bound to HZ value and can provide microsecond-level resolution. Signed-off-by: Xenia Ragiadakou Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/rtl8192u/r819xU_phy.c b/drivers/staging/rtl8192u/r819xU_phy.c index edb5df2c25f5..92f0f90150e9 100644 --- a/drivers/staging/rtl8192u/r819xU_phy.c +++ b/drivers/staging/rtl8192u/r819xU_phy.c @@ -185,7 +185,7 @@ u32 rtl8192_phy_RFSerialRead(struct net_device *dev, RF90_RADIO_PATH_E eRFPath, /* TODO: we should not delay such a long time. Ask for help from SD3 */ - msleep(1); + usleep_range(1000, 1000); ret = rtl8192_QueryBBReg(dev, pPhyReg->rfLSSIReadBack, bLSSIReadBackData); @@ -741,11 +741,11 @@ u8 rtl8192_phy_checkBBAndRF(struct net_device *dev, HW90_BLOCK_E CheckBlock, bMask12Bits, WriteData[i]); /* TODO: we should not delay for such a long time. Ask SD3 */ - msleep(1); + usleep_range(1000, 1000); reg = rtl8192_phy_QueryRFReg(dev, eRFPath, WriteAddr[HW90_BLOCK_RF], bMask12Bits); - msleep(1); + usleep_range(1000, 1000); break; default: