From: "Jiawen Wu" <jiawenwu@trustnetic.com>
To: "'Russell King \(Oracle\)'" <linux@armlinux.org.uk>
Cc: "'Jakub Kicinski'" <kuba@kernel.org>, <netdev@vger.kernel.org>,
<jarkko.nikula@linux.intel.com>,
<andriy.shevchenko@linux.intel.com>,
<mika.westerberg@linux.intel.com>, <jsd@semihalf.com>,
<Jose.Abreu@synopsys.com>, <andrew@lunn.ch>,
<hkallweit1@gmail.com>, <linux-i2c@vger.kernel.org>,
<linux-gpio@vger.kernel.org>, <mengyuanlou@net-swift.com>
Subject: RE: [PATCH net-next v9 8/9] net: txgbe: Implement phylink pcs
Date: Fri, 26 May 2023 17:01:49 +0800 [thread overview]
Message-ID: <026901d98fb0$b5001d80$1f005880$@trustnetic.com> (raw)
In-Reply-To: <ZHBxJP4DXevPNpab@shell.armlinux.org.uk>
On Friday, May 26, 2023 4:43 PM, Russell King (Oracle) wrote:
> On Fri, May 26, 2023 at 02:21:23PM +0800, Jiawen Wu wrote:
> > On Friday, May 26, 2023 12:14 PM, Jakub Kicinski wrote:
> > > On Wed, 24 May 2023 17:17:21 +0800 Jiawen Wu wrote:
> > > > + ret = devm_mdiobus_register(&pdev->dev, mii_bus);
> > > > + if (ret)
> > > > + return ret;
> > > > +
> > > > + mdiodev = mdio_device_create(mii_bus, 0);
> > > > + if (IS_ERR(mdiodev))
> > > > + return PTR_ERR(mdiodev);
> > > > +
> > > > + xpcs = xpcs_create(mdiodev, PHY_INTERFACE_MODE_10GBASER);
> > > > + if (IS_ERR(xpcs)) {
> > > > + mdio_device_free(mdiodev);
> > > > + return PTR_ERR(xpcs);
> > > > + }
> > >
> > > How does the mdiodev get destroyed in case of success?
> > > Seems like either freeing it in case of xpcs error is unnecessary
> > > or it needs to also be freed when xpcs is destroyed?
> >
> > When xpcs is destroyed, that means mdiodev is no longer needed.
> > I think there is no need to free mdiodev in case of xpcs error,
> > since devm_* function leads to free it.
>
> If you are relying on the devm-ness of devm_mdiobus_register() then
> it won't. Although mdiobus_unregister() walks bus->mdio_map[], I
> think you are assuming that the mdio device you've created in
> mdio_device_create() will be in that array. MDIO devices only get
> added to that array when mdiobus_register_device() has been called,
> which must only be called from mdio_device_register().
>
> Please arrange to call mdio_device_free() prior to destroying the
> XPCS in every case.
Get it.
next prev parent reply other threads:[~2023-05-26 9:03 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-24 9:17 [PATCH net-next v9 0/9] TXGBE PHYLINK support Jiawen Wu
2023-05-24 9:17 ` [PATCH net-next v9 1/9] net: txgbe: Add software nodes to support phylink Jiawen Wu
2023-05-27 8:44 ` Andy Shevchenko
2023-05-30 6:11 ` Jiawen Wu
2023-05-30 10:45 ` andy.shevchenko
2023-05-24 9:17 ` [PATCH net-next v9 2/9] i2c: designware: Add driver support for Wangxun 10Gb NIC Jiawen Wu
2023-05-27 8:36 ` Andy Shevchenko
2023-05-24 9:17 ` [PATCH net-next v9 3/9] net: txgbe: Register fixed rate clock Jiawen Wu
2023-05-24 12:17 ` Andrew Lunn
2023-05-24 9:17 ` [PATCH net-next v9 4/9] net: txgbe: Register I2C platform device Jiawen Wu
2023-05-26 9:35 ` kernel test robot
2023-05-27 8:38 ` Andy Shevchenko
2023-05-24 9:17 ` [PATCH net-next v9 5/9] net: txgbe: Add SFP module identify Jiawen Wu
2023-05-26 11:30 ` kernel test robot
2023-05-26 11:36 ` Russell King (Oracle)
2023-05-29 2:06 ` Jiawen Wu
2023-05-30 8:40 ` Jiawen Wu
2023-05-31 9:19 ` Jiawen Wu
2023-05-31 9:47 ` Russell King (Oracle)
2023-05-31 10:11 ` Jiawen Wu
2023-05-24 9:17 ` [PATCH net-next v9 6/9] net: txgbe: Support GPIO to SFP socket Jiawen Wu
2023-05-24 12:51 ` Andrew Lunn
2023-05-24 13:07 ` Russell King (Oracle)
2023-05-24 9:17 ` [PATCH net-next v9 7/9] net: pcs: Add 10GBASE-R mode for Synopsys Designware XPCS Jiawen Wu
2023-05-24 9:17 ` [PATCH net-next v9 8/9] net: txgbe: Implement phylink pcs Jiawen Wu
2023-05-24 12:53 ` Andrew Lunn
2023-05-26 4:14 ` Jakub Kicinski
2023-05-26 6:21 ` Jiawen Wu
2023-05-26 8:43 ` Russell King (Oracle)
2023-05-26 9:01 ` Jiawen Wu [this message]
2023-05-26 9:07 ` Russell King (Oracle)
2023-05-26 9:22 ` Jiawen Wu
2023-05-26 9:37 ` Russell King (Oracle)
2023-05-26 10:42 ` Russell King (Oracle)
2023-05-29 1:57 ` Jiawen Wu
2023-05-24 9:17 ` [PATCH net-next v9 9/9] net: txgbe: Support phylink MAC layer Jiawen Wu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='026901d98fb0$b5001d80$1f005880$@trustnetic.com' \
--to=jiawenwu@trustnetic.com \
--cc=Jose.Abreu@synopsys.com \
--cc=andrew@lunn.ch \
--cc=andriy.shevchenko@linux.intel.com \
--cc=hkallweit1@gmail.com \
--cc=jarkko.nikula@linux.intel.com \
--cc=jsd@semihalf.com \
--cc=kuba@kernel.org \
--cc=linux-gpio@vger.kernel.org \
--cc=linux-i2c@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=mengyuanlou@net-swift.com \
--cc=mika.westerberg@linux.intel.com \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).