From: Alan Stern <stern@rowland.harvard.edu>
To: Kai-Heng Feng <kai.heng.feng@canonical.com>
Cc: gregkh@linuxfoundation.org, mathias.nyman@linux.intel.com,
Thinh Nguyen <Thinh.Nguyen@synopsys.com>,
Andrew Lunn <andrew@lunn.ch>, Rajat Jain <rajatja@google.com>,
Chris Chiu <chris.chiu@canonical.com>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] usb: core: Avoid doing warm reset on disconnect event
Date: Tue, 21 Dec 2021 09:30:02 -0500 [thread overview]
Message-ID: <YcHk6pam0plSFT3M@rowland.harvard.edu> (raw)
In-Reply-To: <CAAd53p6uXBa2zms1M0aqvRhVWq-kNtw2LvgE5ai94NWMDi5rYQ@mail.gmail.com>
On Tue, Dec 21, 2021 at 11:35:25AM +0800, Kai-Heng Feng wrote:
> (
>
>
> On Fri, Nov 26, 2021 at 11:30 PM Alan Stern <stern@rowland.harvard.edu> wrote:
> > Why is it correct to skip doing a warm reset on a disconnected port here, but not
> > correct to skip doing a warm reset on a disconnected port in all the other places
> > where hub_port_warm_reset_required() gets called?
>
> Can a disconnect event happens to other places other than port_event()?
A disconnect can happen at any time. After all, users can unplug USB
cables whenever they want.
Alan Stern
next prev parent reply other threads:[~2021-12-21 14:30 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-26 11:56 [PATCH v2] usb: core: Avoid doing warm reset on disconnect event Kai-Heng Feng
2021-11-26 15:30 ` Alan Stern
2021-12-21 3:35 ` Kai-Heng Feng
2021-12-21 14:30 ` Alan Stern [this message]
2021-11-29 10:19 ` Mathias Nyman
2021-11-30 2:36 ` Kai-Heng Feng
2021-12-02 3:10 ` Kai-Heng Feng
2021-12-03 14:17 ` Mathias Nyman
2021-12-06 2:52 ` Kai-Heng Feng
2021-12-21 3:35 ` Kai-Heng Feng
2021-12-22 15:11 ` Mathias Nyman
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