From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Nelson <eric.nelson@boundarydevices.com>
Date: Tue, 24 Feb 2015 16:10:33 -0700
Subject: [U-Boot] UMS on mx6sl
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Hi Fabio,

On 02/24/2015 03:25 PM, Fabio Estevam wrote:
> On Tue, Feb 24, 2015 at 7:22 PM, Fabio Estevam <festevam@gmail.com> wrote:
>> Hi,
>>
>> I am trying to get USB Mass Storage to work on mx6slevk, but I am
>> getting the following error:
>>
>> => ums 0 mmc 1
>> UMS: disk start sector: 0x0, count: 0x762c00
>> g_dnl_register: failed!, error: -22
>> ERROR: g_dnl_register failed
>> at common/cmd_usb_mass_storage.c:107/do_usb_mass_storage()
>>
>> On mx6qsabresd it works fine and I am able to mount the SD/eMMC card
>> on the host PC.
>>
>> The mx6slevk changes are the same as the ones for sabresd and look like this:

You might want to check this value:

#define CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP