[PATCH 2/2] mmc: Use mmc_delay() instead of mdelay() for time delay

[Lan Chunhe]

On Thu, 25 Aug 2011 18:23:35 +0800, Kyungmin Park <kmpark at infradead.org>  
wrote:

> On Thu, Aug 25, 2011 at 5:54 PM, Chunhe Lan <Chunhe.Lan at freescale.com>  
> wrote:
>> 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 at freescale.com>
>> Signed-off-by: Chunhe Lan <Chunhe.Lan at freescale.com>
>> Cc: Chris Ball <cjb at laptop.org>
>> ---
>>  drivers/mmc/host/sdhci.c |   11 ++++++-----
>>  1 files changed, 6 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
>> index 0e02cc1..0cb5dc1 100644
>> --- a/drivers/mmc/host/sdhci.c
>> +++ b/drivers/mmc/host/sdhci.c
>> @@ -27,6 +27,7 @@
>>  #include <linux/mmc/host.h>
>>
>>  #include "sdhci.h"
>> +#include "../core/core.h"
>
> Doesn't better to move the mmc_delay() to "include/linux/mmc/core.h"?
> and include it.
> I think It's not proper include syntax using relative path.

    Yes, your suggestion is very good.
    I will move the mmc_delay() to "include/linux/mmc/core.h" .

    Thanks.

    -Jack Lan

> Thank you,
> Kyungmin Park
>>
>>  #define DRIVER_NAME "sdhci"
>>