Received-SPF: pass (google.com: domain of linux-kernel+bounces-176602-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) client-ip=2604:1380:4601:e00::3;
Date: Sat, 11 May 2024 16:23:10 +0100
From: Simon Horman <horms@kernel.org>
To: Jose Ignacio Tornos Martinez <jtornosm@redhat.com>
Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
	pabeni@redhat.com, linux-usb@vger.kernel.org,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	stable@vger.kernel.org, Isaac Ganoung <inventor500@vivaldi.net>,
	Yongqin Liu <yongqin.liu@linaro.org>
Subject: Re: [PATCH] net: usb: ax88179_178a: fix link status when link is set
 to down/up
Message-ID: <20240511152310.GL2347895@kernel.org>
References: <20240510090846.328201-1-jtornosm@redhat.com>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20240510090846.328201-1-jtornosm@redhat.com>

On Fri, May 10, 2024 at 11:08:28AM +0200, Jose Ignacio Tornos Martinez wrote:
> The idea was to keep only one reset at initialization stage in order to
> reduce the total delay, or the reset from usbnet_probe or the reset from
> usbnet_open.
> 
> I have seen that restarting from usbnet_probe is necessary to avoid doing
> too complex things. But when the link is set to down/up (for example to
> configure a different mac address) the link is not correctly recovered
> unless a reset is commanded from usbnet_open.
> 
> So, detect the initialization stage (first call) to not reset from
> usbnet_open after the reset from usbnet_probe and after this stage, always
> reset from usbnet_open too (when the link needs to be rechecked).
> 
> Apply to all the possible devices, the behavior now is going to be the same.
> 
> cc: stable@vger.kernel.org # 6.6+
> Fixes: 56f78615bcb1 ("net: usb: ax88179_178a: avoid writing the mac address before first reading")
> Reported-by: Isaac Ganoung <inventor500@vivaldi.net>
> Reported-by: Yongqin Liu <yongqin.liu@linaro.org>
> Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@redhat.com>

Reviewed-by: Simon Horman <horms@kernel.org>