The mmc_delay() is a wrapper function for mdelay() and msleep().
o mdelay() -- block the system when busy-waiting.
o msleep() -- suspend the currently running task to enable CPU
to process other tasks, so it is non-blocking
regarding the whole system.
When the desired delay time is more than a period of timer interrupt,
just use msleep(). Change mdelay() to mmc_delay() to avoid chewing
CPU when busy wait.
Signed-off-by: Shengzhou Liu <b36685@xxxxxxxxxxxxx>
Signed-off-by: Chunhe Lan <Chunhe.Lan@xxxxxxxxxxxxx>
Cc: Chris Ball <cjb@xxxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 10 +++++-----
1 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 0e02cc1..b0cf79f 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -186,7 +186,7 @@ static void sdhci_reset(struct sdhci_host *host, u8 mask)
return;
}
timeout--;
- mdelay(1);
+ mmc_delay(1);
}
if (host->ops->platform_reset_exit)
@@ -957,7 +957,7 @@ static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
return;
}
timeout--;
- mdelay(1);
+ mmc_delay(1);
}
mod_timer(&host->timer, jiffies + 10 * HZ);
@@ -1127,7 +1127,7 @@ static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
return;
}
timeout--;
- mdelay(1);
+ mmc_delay(1);
}
clk |= SDHCI_CLOCK_CARD_EN;
@@ -1192,7 +1192,7 @@ static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
* can apply clock after applying power
*/
if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER)
- mdelay(10);
+ mmc_delay(10);
}
/*****************************************************************************\
@@ -1712,7 +1712,7 @@ static int sdhci_execute_tuning(struct mmc_host *mmc)
ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
tuning_loop_counter--;
timeout--;
- mdelay(1);
+ mmc_delay(1);
} while (ctrl & SDHCI_CTRL_EXEC_TUNING);
/*
--
1.7.5.1
--
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