From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sujit Reddy Thumma Subject: [PATCH] mmc: core: Use usleep_range for delays less than 20ms Date: Wed, 9 Nov 2011 09:19:53 +0530 Message-ID: <1320810593-19948-1-git-send-email-sthumma@codeaurora.org> Return-path: Sender: linux-arm-msm-owner@vger.kernel.org To: linux-mmc@vger.kernel.org Cc: Sujit Reddy Thumma , linux-arm-msm@vger.kernel.org, cjb@laptop.org List-Id: linux-mmc@vger.kernel.org msleep of any delay less than 20ms (or 2 jiffies) would give an unpredictable delay (most of the times as ~20ms). Use usleep_range in mmc_delay() for delays less than two jiffies. Signed-off-by: Sujit Reddy Thumma --- drivers/mmc/core/core.h | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h index 14664f1..45a6a12 100644 --- a/drivers/mmc/core/core.h +++ b/drivers/mmc/core/core.h @@ -50,6 +50,8 @@ static inline void mmc_delay(unsigned int ms) if (ms < 1000 / HZ) { cond_resched(); mdelay(ms); + } else if (ms < jiffies_to_msecs(2)) { + usleep_range(ms * 1000, (ms + 1) * 1000); } else { msleep(ms); } -- Sent by a consultant of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.