On 2 September 2015 at 17:16, Vaibhav Hiremath
<vaibhav.hiremath@xxxxxxxxxx> wrote:
>
>
> On Wednesday 02 September 2015 08:37 PM, Joe Perches wrote:
>>
>> On Wed, 2015-09-02 at 18:37 +0530, Vaibhav Hiremath wrote:
>>>
>>> On Wednesday 02 September 2015 02:07 AM, Joe Perches wrote:
>>>>
>>>> On Wed, 2015-09-02 at 00:54 +0530, Vaibhav Hiremath wrote:
>>>>>
>>>>> Return value would give clear information about the actual root-cause
>>>>> of the failure.
>>>>> diff --git a/drivers/mmc/host/sdhci-pxav3.c
>>>>> b/drivers/mmc/host/sdhci-pxav3.c
>>>>> @@ -455,7 +455,7 @@ static int sdhci_pxav3_probe(struct platform_device
>>>>> *pdev)
>>>>>
>>>>> ret = sdhci_add_host(host);
>>>>> if (ret) {
>>>>> - dev_err(&pdev->dev, "failed to add host\n");
>>>>> + dev_err(&pdev->dev, "failed to add host ret - %d\n",
>>>>> ret);
>>>>> goto err_add_host;
>>>>> }
>>>>
>>>>
>>>> If this is really desirable, there are many other callers of
>>>> sdhci_add_host with error messages just like this one.
>>>>
>>> How about this? If you are ok, I can change it and submit the patch
>>> again.
>>> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
>>
>> []
>>>
>>> @@ -3176,8 +3176,11 @@ int sdhci_add_host(struct sdhci_host *host)
>>> mmc->caps |= MMC_CAP_NEEDS_POLL;
>>>
>>> /* If there are external regulators, get them */
>>> - if (mmc_regulator_get_supply(mmc) == -EPROBE_DEFER)
>>> + if (mmc_regulator_get_supply(mmc) == -EPROBE_DEFER) {
>>> + pr_err("%s: regulator supply unavailable, deferring
>>> probe. \n",
>>> + mmc_hostname(mmc));
>>> return -EPROBE_DEFER;
>>> + }
>>
>>
>> (your email client has inappropriate line wrapping)
>>
>> The KERN_<LEVEL> here probably isn't right.
>>
>> Deferring isn't an error, at best it's a notification
>
>
> I would consider it as an ERROR if it gets deferred
> continuously/multiple times due to same reason.
>
>> and perhaps should be at pr_notice/KERN_NOTICE
>>
>
> Yeah, KERN_NOTICE looks right here.
>
>> I don't know how often or how many times this deferral
>> can occur. Do you?
>>
>
> -EDEFER_PROBE usually means that driver has some dependency,
> for which it has to wait.
> In my case, during every boot, I pxav3_sdhci_probe gets deferred once
> due to regulator unavailability.
The driver core already prints a message on the debug level for
-EDEFER_PROBE. Please don't do that in the driver as well.
Kind regards
Uffe
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
