From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Warren <swarren@wwwdotorg.org>
Date: Mon, 14 Mar 2016 12:01:17 -0600
Subject: [U-Boot] [PATCH v2 25/32] dm: usb: Convert USB storage to use
 driver-model for block devs
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 <1456784765-10788-26-git-send-email-sjg@chromium.org>
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On 02/29/2016 03:25 PM, Simon Glass wrote:
> Update this code to support CONFIG_BLK. Each USB storage device can have
> one or more block devices as children, each one representing a LUN
> (logical unit) of the USB device.

Note that I accidentally tested some other patches in the wrong place 
today, and found that this patch prevents my USB SD card reader from 
working when attached to Jetson TK1. I get:

U-Boot 2016.03-rc3-00056-gb3601815cf72 (Mar 14 2016 - 11:54:53 -0600)

TEGRA124
Model: NVIDIA Jetson TK1
Board: NVIDIA Jetson TK1
DRAM:  2 GiB
MMC:   Tegra SD/MMC: 0, Tegra SD/MMC: 1
In:    serial
Out:   serial
Err:   serial
Net:   No ethernet found.
Hit any key to stop autoboot:  0
Tegra124 (Jetson TK1) # usb start
starting USB...
USB0:   USB EHCI 1.10
USB1:   USB EHCI 1.10
scanning bus 0 for devices... 1 USB Device(s) found
scanning bus 1 for devices... Device NOT ready
    Request Sense returned 02 3A 00
### ERROR ### Please RESET the board ###

(The Request Sense error happens even in the passing cases, but in those 
cases the overall "usb start" operation succeeds, and then USB storage 
access does actually work. I guess my reader is a little slow to 
initialize or something).

The patch immediately before this one works fine.

Can you reproduce this? If not, let me know and I'll investigate further.