From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marek Vasut <marex@denx.de>
Date: Sun, 21 Mar 2021 05:09:00 +0100
Subject: [PATCH 1/6] usb: Return -ENOSYS when system call is not available
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References: <20210321031824.2170848-1-sjg@chromium.org>
 <20210321031824.2170848-2-sjg@chromium.org>
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On 3/21/21 4:18 AM, Simon Glass wrote:
> Update usb_gadget_release() to use -ENOSYS, which is the correct error
> code for U-Boot.

It would be good if you could explain _why_ this change is required. Why 
is ENOSYS the correct return value ? It is not clear from the patch 
description, sorry.