From: Arend van Spriel <arend@broadcom.com>
To: Chris Ball <chris@printf.net>
Cc: Aaron Lu <aaron.lu@intel.com>,
linux-mmc@vger.kernel.org, Dong Aisheng <dongas86@gmail.com>
Subject: Re: RESEND:[PATCH V3] sdhci: only reprogram retuning timer when flag is set
Date: Tue, 25 Mar 2014 21:49:53 +0100 [thread overview]
Message-ID: <5331EBF1.4030600@broadcom.com> (raw)
In-Reply-To: <532A7D87.4000009@intel.com>
On 03/20/14 06:32, Aaron Lu wrote:
> On 02/22/2014 03:59 AM, Arend van Spriel wrote:
>> When the host->tuning_count is zero it means that the
>> retuning is disabled. This is checked on the first
>> run of sdhci_execute_tuning() by the if statement below:
>>
>> if (!(host->flags& SDHCI_NEEDS_RETUNING)&& host->tuning_count&&
>> (host->tuning_mode == SDHCI_TUNING_MODE_1)) {
>>
>> So only when tuning_count is non-zero it will set the host
>> flag SDHCI_USING_RETUNING_TIMER. The else statement is only
>> for re-programming the timer, which means that flag must be
>> set. Because that is not checked the else statement is executed
>> in the first run when tuning_count is zero.
>>
>> This was seen on a host controller which indicated
>> SDHCI_TUNING_MODE_1 (0) and tuning_count being zero. Suspect
>> that (one of) these registers is not properly set.
>>
>> Cc: Dong Aisheng<dongas86@gmail.com>
>> Cc: Aaron Lu<aaron.lwe@gmail.com>
>> Signed-off-by: Arend van Spriel<arend@broadcom.com>
>
> In addition to solve your problem, this patch also makes sense in the
> common case, so:
>
> Reviewed-by: Aaron Lu<aaron.lu@intel.com>
Hi Chris,
Is this patch still in your queue?
Regards,
Arend
next prev parent reply other threads:[~2014-03-25 20:49 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-21 19:59 RESEND:[PATCH V3] sdhci: only reprogram retuning timer when flag is set Arend van Spriel
2014-03-06 9:29 ` Arend van Spriel
2014-03-07 4:06 ` Ulf Hansson
2014-03-18 21:02 ` Arend van Spriel
2014-03-20 5:32 ` Aaron Lu
2014-03-25 20:49 ` Arend van Spriel [this message]
2014-03-25 20:56 ` Chris Ball
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