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Message-ID: <8f220084-6f2c-f7d2-7bb6-3051c28c019c@suse.com>
Date: Wed, 30 Nov 2022 15:04:28 +0100
From: Oliver Neukum <oneukum@...e.com>
To: Martin Kepplinger <martin.kepplinger@...i.sm>, johan@...nel.org,
gregkh@...uxfoundation.org
Cc: linux-usb@...r.kernel.org, phone-devel@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [RFC v1] hack: suspend: usb: option: add reset_resume callback
On 30.11.22 13:15, Martin Kepplinger wrote:
> Currently to be the same as resume(). This will just avoid re-enumeration
> of the modem device on every system resume.
>
> This exists only because the usb core will re-enumerate *any* device
> whos' driver doesn't have reset_resume() implemented. A call trace:
Hi,
this is deeply problematic. Strictly speaking it introduces a bug.
By implementing reset_resume() you are telling the rest of the system
that all settings have survived the hibernation. That is likely wrong in
your case.
Regards
Oliver
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