From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Nelson <eric@nelint.com>
Date: Fri, 4 Dec 2015 09:35:23 -0700
Subject: [U-Boot] mmc erase fails from U-Boot command line
In-Reply-To: <CAOMZO5AQHx7wccKBF8T7OR2W+19Z2emEYObpYpuOq5QbD-DBgA@mail.gmail.com>
References: <5620E3A7.7040909@defengcorp.com> <5624CEC5.8040901@digi.com>
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 <CAOMZO5CiyCiJ0cd20crhzPzT9xBXupvZDSej5Fo_ic5ZugN_Ew@mail.gmail.com>
 <CAOMZO5DoOdh0wU2vv1iyUWt=PAxxV_nugun-bny1Cddes+JHMg@mail.gmail.com>
 <565DEF80.90204@nelint.com>
 <CAOMZO5Bw8fiOOsvD99Qwb-trcNcXN9ysEMy5AoUCFYKtg4tfnw@mail.gmail.com>
 <565F3CD3.1010100@nelint.com>
 <CAOMZO5C5yTV_KtXxD3im6r5-7RZGSS9VActGdO4mDVc7DmdPyg@mail.gmail.com>
 <565F4674.8010306@nelint.com>
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To: u-boot@lists.denx.de

Hi Fabio,

On 12/02/2015 12:53 PM, Fabio Estevam wrote:
> On Wed, Dec 2, 2015 at 5:28 PM, Eric Nelson <eric@nelint.com> wrote:
> 
...
>>
>> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
>> index 53084a7..8f5d9e1 100644
>> --- a/drivers/mmc/mmc.c
>> +++ b/drivers/mmc/mmc.c
>> @@ -105,6 +105,9 @@ int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd
>> *cmd, struct mmc_data *data)
>>  #else
>>         ret = mmc->cfg->ops->send_cmd(mmc, cmd, data);
>>  #endif
>> +       if (ret)
>> +               printf("error %d from CMD_SEND:%d\n", ret, cmd->cmdidx);
>> +
>>         return ret;
> 
> Applying this change on top of head I get:
> 
> => mmc erase 4000 1000
> 
> MMC erase: dev # 2, block # 16384, count 4096 ... Timeout waiting for DAT0 to go
>  high!
> error -19 from CMD_SEND:38
> mmc erase failed
> 0 blocks erased: ERROR

How easy is this for you to reproduce?

I'm only seeing the error sporadically, which makes it difficult to
test.