From: Andrew Lunn <andrew@lunn.ch>
To: Lukas Wunner <lukas@wunner.de>
Cc: Steve Glendinning <steve.glendinning@shawell.net>,
UNGLinuxDriver@microchip.com, Oliver Neukum <oneukum@suse.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
netdev@vger.kernel.org, linux-usb@vger.kernel.org,
Andre Edich <andre.edich@microchip.com>,
Oleksij Rempel <o.rempel@pengutronix.de>,
Martyn Welch <martyn.welch@collabora.com>,
Gabriel Hojda <ghojda@yo2urs.ro>,
Christoph Fritz <chf.fritz@googlemail.com>,
Lino Sanfilippo <LinoSanfilippo@gmx.de>,
Philipp Rosenberger <p.rosenberger@kunbus.com>,
Heiner Kallweit <hkallweit1@gmail.com>,
Russell King <linux@armlinux.org.uk>
Subject: Re: [PATCH net] usbnet: smsc95xx: Fix deadlock on runtime resume
Date: Wed, 27 Apr 2022 17:24:50 +0200 [thread overview]
Message-ID: <YmlgQhauzZ/tkX/v@lunn.ch> (raw)
In-Reply-To: <6710d8c18ff54139cdc538763ba544187c5a0cee.1651041411.git.lukas@wunner.de>
On Wed, Apr 27, 2022 at 08:41:49AM +0200, Lukas Wunner wrote:
> Commit 05b35e7eb9a1 ("smsc95xx: add phylib support") amended
> smsc95xx_resume() to call phy_init_hw(). That function waits for the
> device to runtime resume even though it is placed in the runtime resume
> path, causing a deadlock.
Hi Lukas
You have looked at this code, tried a few different things, so this is
probably a dumb question.
Do you actually need to call phy_init_hw()?
mdio_bus_phy_resume() will call phy_init_hw(). So long as you first
resume the MAC and then the PHY, shouldn't this just work?
Andrew
next prev parent reply other threads:[~2022-04-27 15:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-27 6:41 [PATCH net] usbnet: smsc95xx: Fix deadlock on runtime resume Lukas Wunner
2022-04-27 14:00 ` Alan Stern
2022-04-27 15:10 ` Lukas Wunner
2022-04-27 15:24 ` Andrew Lunn [this message]
2022-04-27 15:38 ` Lukas Wunner
2022-04-27 18:19 ` Alan Stern
2022-04-27 15:45 ` Lukas Wunner
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