From: Andrew Lunn <andrew@lunn.ch>
To: Oleksij Rempel <o.rempel@pengutronix.de>
Cc: "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Heiner Kallweit <hkallweit1@gmail.com>,
Russell King <linux@armlinux.org.uk>,
kernel@pengutronix.de, linux-kernel@vger.kernel.org,
linux-usb@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH net-next v1 7/7] usbnet: run unbind() before unregister_netdev()
Date: Sat, 5 Jun 2021 01:41:15 +0200 [thread overview]
Message-ID: <YLq6G9luZrXW5vry@lunn.ch> (raw)
In-Reply-To: <20210604134244.2467-8-o.rempel@pengutronix.de>
On Fri, Jun 04, 2021 at 03:42:44PM +0200, Oleksij Rempel wrote:
> unbind() is the proper place to disconnect PHY, but it will fail if
> netdev is already unregistered.
O.K, this partially answers the question i was about to ask for the
previous patch.
void phy_start(struct phy_device *phydev)
{
mutex_lock(&phydev->lock);
if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
WARN(1, "called from state %s\n",
phy_state_to_str(phydev->state));
goto out;
}
By skipping phy_error(), phydev->state is not set to PHY_HALTED. So if
you try to start the phy again, without disconnecting it, it looks
like there could be a problem.
But with this patch, i assume the PHY will always be disconnected and
later reconnected when the device is replugged.
Andrew
next prev parent reply other threads:[~2021-06-04 23:41 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-04 13:42 [PATCH net-next v1 0/7] port asix ax88772 to the PHYlib Oleksij Rempel
2021-06-04 13:42 ` [PATCH net-next v1 1/7] net: usb: asix: ax88772_bind: use devm_kzalloc() instead of kzalloc() Oleksij Rempel
2021-06-04 23:05 ` Andrew Lunn
2021-06-04 13:42 ` [PATCH net-next v1 2/7] net: usb: asix: ax88772: add phylib support Oleksij Rempel
2021-06-04 23:18 ` Andrew Lunn
2021-06-04 13:42 ` [PATCH net-next v1 3/7] net: usb/phy: asix: add support for ax88772A/C PHYs Oleksij Rempel
2021-06-04 23:23 ` Andrew Lunn
2021-06-04 13:42 ` [PATCH net-next v1 4/7] net: usb: asix: ax88772: add generic selftest support Oleksij Rempel
2021-06-04 23:24 ` Andrew Lunn
2021-06-04 13:42 ` [PATCH net-next v1 5/7] net: usb: asix: add error handling for asix_mdio_* functions Oleksij Rempel
2021-06-04 23:31 ` Andrew Lunn
2021-06-07 7:55 ` Oleksij Rempel
2021-06-04 13:42 ` [PATCH net-next v1 6/7] net: phy: do not print dump stack if device was removed Oleksij Rempel
2021-06-04 13:42 ` [PATCH net-next v1 7/7] usbnet: run unbind() before unregister_netdev() Oleksij Rempel
2021-06-04 23:41 ` Andrew Lunn [this message]
2021-06-07 8:04 ` Oleksij Rempel
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