From: Bartosz Golaszewski <brgl@bgdev.pl>
To: Jonathan Corbet <corbet@lwn.net>,
Jeff Kirsher <jeffrey.t.kirsher@intel.com>,
"David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, John Crispin <john@phrozen.org>,
Sean Wang <sean.wang@mediatek.com>,
Mark Lee <Mark-MC.Lee@mediatek.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Realtek linux nic maintainers <nic_swsd@realtek.com>,
Heiner Kallweit <hkallweit1@gmail.com>,
Andrew Lunn <andrew@lunn.ch>,
Florian Fainelli <f.fainelli@gmail.com>,
Russell King <linux@armlinux.org.uk>,
Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>
Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org,
Fabien Parent <fparent@baylibre.com>,
Stephane Le Provost <stephane.leprovost@mediatek.com>,
Pedro Tsai <pedro.tsai@mediatek.com>,
Andrew Perepech <andrew.perepech@mediatek.com>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: [PATCH 00/11] net: improve devres helpers
Date: Mon, 22 Jun 2020 12:00:45 +0200 [thread overview]
Message-ID: <20200622100056.10151-1-brgl@bgdev.pl> (raw)
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
When I first submitted the series adding devm_register_netdev() I was
told during review that it should check if the underlying struct net_device
is managed too before proceeding. I initially accepted this as the right
approach but in the back of my head something seemed wrong about this.
I started looking around and noticed how devm_mdiobus_register()
is implemented.
It turned out that struct mii_bus contains information about whether it's
managed or not and the release callback of devm_mdiobus_alloc() is responsible
for calling mdiobus_unregister(). This seems wrong to me as managed structures
shouldn't care about who manages them. It's devres' code task to correctly undo
whatever it registers/allocates.
With this series I propose to make the release callbacks of mdiobus devm
helpers only release the resources they actually allocate themselves as it the
standard in devm routines. I also propose to not check whether the structures
passed to devm_mdiobus_register() and devm_register_netdev() are already
managed as they could have been allocated over devres as part of bigger
memory chunk. I see this as an unnecessary limitation.
First two patches aim at removing the only use of devm_mdiobus_free(). It
modifies the ixgbe driver. I only compile tested it as I don't have the
relevant hw.
Next two patches relax devm_register_netdev() - we stop checking whether
struct net_device was registered using devm_etherdev_alloc().
We then document the mdio devres helper that's missing in devres.rst list
and un-inline the current implementation of devm_mdiobus_register().
Patch 8 re-implements the devres helpers for mdio conforming to common
devres patterns.
Patches 9 and 10 provide devm_of_mdiobus_register() and the last patch
adds its first user.
Bartosz Golaszewski (11):
net: ethernet: ixgbe: check the return value of ixgbe_mii_bus_init()
net: ethernet: ixgbe: don't call devm_mdiobus_free()
net: devres: relax devm_register_netdev()
net: devres: rename the release callback of devm_register_netdev()
Documentation: devres: add missing mdio helper
phy: un-inline devm_mdiobus_register()
phy: mdio: add kerneldoc for __devm_mdiobus_register()
net: phy: don't abuse devres in devm_mdiobus_register()
of: mdio: remove the 'extern' keyword from function declarations
of: mdio: provide devm_of_mdiobus_register()
net: ethernet: mtk-star-emac: use devm_of_mdiobus_register()
.../driver-api/driver-model/devres.rst | 3 +-
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 6 +-
drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c | 14 +---
drivers/net/ethernet/mediatek/mtk_star_emac.c | 13 +--
drivers/net/ethernet/realtek/r8169_main.c | 2 +-
drivers/net/phy/Makefile | 2 +-
drivers/net/phy/mdio_bus.c | 73 ----------------
drivers/net/phy/mdio_devres.c | 83 +++++++++++++++++++
drivers/of/of_mdio.c | 43 ++++++++++
include/linux/of_mdio.h | 40 ++++-----
include/linux/phy.h | 21 +----
net/devres.c | 23 +----
12 files changed, 167 insertions(+), 156 deletions(-)
create mode 100644 drivers/net/phy/mdio_devres.c
--
2.26.1
next reply other threads:[~2020-06-22 10:01 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-22 10:00 Bartosz Golaszewski [this message]
2020-06-22 10:00 ` [PATCH 01/11] net: ethernet: ixgbe: check the return value of ixgbe_mii_bus_init() Bartosz Golaszewski
2020-06-22 10:00 ` [PATCH 02/11] net: ethernet: ixgbe: don't call devm_mdiobus_free() Bartosz Golaszewski
2020-06-22 10:00 ` [PATCH 03/11] net: devres: relax devm_register_netdev() Bartosz Golaszewski
2020-06-22 22:49 ` Jakub Kicinski
2020-06-23 9:12 ` Bartosz Golaszewski
2020-06-23 20:16 ` Jakub Kicinski
2020-06-22 10:00 ` [PATCH 04/11] net: devres: rename the release callback of devm_register_netdev() Bartosz Golaszewski
2020-06-22 10:00 ` [PATCH 05/11] Documentation: devres: add missing mdio helper Bartosz Golaszewski
2020-06-22 10:00 ` [PATCH 06/11] phy: un-inline devm_mdiobus_register() Bartosz Golaszewski
2020-06-22 23:55 ` Florian Fainelli
2020-06-25 9:16 ` Bartosz Golaszewski
2020-06-22 10:00 ` [PATCH 07/11] phy: mdio: add kerneldoc for __devm_mdiobus_register() Bartosz Golaszewski
2020-06-22 10:00 ` [PATCH 08/11] net: phy: don't abuse devres in devm_mdiobus_register() Bartosz Golaszewski
2020-06-22 10:00 ` [PATCH 09/11] of: mdio: remove the 'extern' keyword from function declarations Bartosz Golaszewski
2020-06-22 10:00 ` [PATCH 10/11] of: mdio: provide devm_of_mdiobus_register() Bartosz Golaszewski
2020-06-22 10:00 ` [PATCH 11/11] net: ethernet: mtk-star-emac: use devm_of_mdiobus_register() Bartosz Golaszewski
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