From: Calvin Johnson <calvin.johnson@oss.nxp.com>
To: Russell King - ARM Linux admin <linux@armlinux.org.uk>
Cc: Grant Likely <grant.likely@arm.com>,
"Rafael J . Wysocki" <rafael@kernel.org>,
Jeremy Linton <jeremy.linton@arm.com>,
Andrew Lunn <andrew@lunn.ch>,
Andy Shevchenko <andy.shevchenko@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Cristi Sovaiala <cristian.sovaiala@nxp.com>,
Florin Laurentiu Chiculita <florinlaurentiu.chiculita@nxp.com>,
Ioana Ciornei <ioana.ciornei@nxp.com>,
Madalin Bucur <madalin.bucur@oss.nxp.com>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
Marcin Wojtas <mw@semihalf.com>,
Pieter Jansen Van Vuuren <pieter.jansenvv@bamboosystems.io>,
Jon <jon@solid-run.com>, Saravana Kannan <saravanak@google.com>,
Randy Dunlap <rdunlap@infradead.org>,
Laurentiu Tudor <laurentiu.tudor@nxp.com>,
linux-kernel@vger.kernel.org, linux.cj@gmail.com,
Diana Madalina Craciun <diana.craciun@nxp.com>,
netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-acpi@vger.kernel.org,
"David S. Miller" <davem@davemloft.net>,
Ioana Radulescu <ruxandra.radulescu@nxp.com>,
Jakub Kicinski <kuba@kernel.org>
Subject: Re: [net-next PATCH v5 15/15] net: dpaa2-mac: Add ACPI support for DPAA2 MAC driver
Date: Mon, 15 Feb 2021 18:03:09 +0530 [thread overview]
Message-ID: <20210215123309.GA5067@lsv03152.swis.in-blr01.nxp.com> (raw)
In-Reply-To: <20210208162831.GM1463@shell.armlinux.org.uk>
On Mon, Feb 08, 2021 at 04:28:31PM +0000, Russell King - ARM Linux admin wrote:
> On Mon, Feb 08, 2021 at 08:42:44PM +0530, Calvin Johnson wrote:
> > Modify dpaa2_mac_connect() to support ACPI along with DT.
> > Modify dpaa2_mac_get_node() to get the dpmac fwnode from either
> > DT or ACPI.
> >
> > Replace of_get_phy_mode with fwnode_get_phy_mode to get
> > phy-mode for a dpmac_node.
> >
> > Use helper function phylink_fwnode_phy_connect() to find phy_dev and
> > connect to mac->phylink.
> >
> > Signed-off-by: Calvin Johnson <calvin.johnson@oss.nxp.com>
>
> I don't think this does the full job.
>
> > static int dpaa2_pcs_create(struct dpaa2_mac *mac,
> > - struct device_node *dpmac_node, int id)
> > + struct fwnode_handle *dpmac_node,
> > + int id)
> > {
> > struct mdio_device *mdiodev;
> > - struct device_node *node;
> > + struct fwnode_handle *node;
> >
> > - node = of_parse_phandle(dpmac_node, "pcs-handle", 0);
> > - if (!node) {
> > + node = fwnode_find_reference(dpmac_node, "pcs-handle", 0);
> > + if (IS_ERR(node)) {
> > /* do not error out on old DTS files */
> > netdev_warn(mac->net_dev, "pcs-handle node not found\n");
> > return 0;
> > }
> >
> > - if (!of_device_is_available(node)) {
> > + if (!of_device_is_available(to_of_node(node))) {
>
> If "node" is an ACPI node, then to_of_node() returns NULL, and
> of_device_is_available(NULL) is false. So, if we're using ACPI
> and we enter this path, we will always hit the error below:
>
> > netdev_err(mac->net_dev, "pcs-handle node not available\n");
> > - of_node_put(node);
> > + of_node_put(to_of_node(node));
> > return -ENODEV;
> > }
>
> > @@ -306,7 +321,7 @@ int dpaa2_mac_connect(struct dpaa2_mac *mac)
> > * error out if the interface mode requests them and there is no PHY
> > * to act upon them
> > */
> > - if (of_phy_is_fixed_link(dpmac_node) &&
> > + if (of_phy_is_fixed_link(to_of_node(dpmac_node)) &&
>
> If "dpmac_node" is an ACPI node, to_of_node() will return NULL, and
> of_phy_is_fixed_link() will oops.
I think of_phy_is_fixed_link() needs to be fixed. I'll add below fix.
--- a/drivers/net/mdio/of_mdio.c
+++ b/drivers/net/mdio/of_mdio.c
@@ -439,6 +439,9 @@ bool of_phy_is_fixed_link(struct device_node *np)
int len, err;
const char *managed;
+ if (!np)
+ return false;
+
/* New binding */
dn = of_get_child_by_name(np, "fixed-link");
if (dn) {
Regards
Calvin
next prev parent reply other threads:[~2021-02-15 12:34 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-08 15:12 [net-next PATCH v5 00/15] ACPI support for dpaa2 driver Calvin Johnson
2021-02-08 15:12 ` [net-next PATCH v5 01/15] Documentation: ACPI: DSD: Document MDIO PHY Calvin Johnson
2021-02-08 20:01 ` Randy Dunlap
2021-02-09 14:34 ` Calvin Johnson
2021-02-08 15:12 ` [net-next PATCH v5 02/15] net: phy: Introduce fwnode_mdio_find_device() Calvin Johnson
2021-02-08 15:12 ` [net-next PATCH v5 03/15] net: phy: Introduce phy related fwnode functions Calvin Johnson
2021-02-08 15:12 ` [net-next PATCH v5 04/15] of: mdio: Refactor of_phy_find_device() Calvin Johnson
2021-02-08 15:12 ` [net-next PATCH v5 05/15] net: phy: Introduce fwnode_get_phy_id() Calvin Johnson
2021-02-08 15:12 ` [net-next PATCH v5 06/15] of: mdio: Refactor of_get_phy_id() Calvin Johnson
2021-02-08 15:12 ` [net-next PATCH v5 07/15] net: mdiobus: Introduce fwnode_mdiobus_register_phy() Calvin Johnson
2021-02-08 17:40 ` Russell King - ARM Linux admin
2021-02-09 15:04 ` Calvin Johnson
2021-02-08 15:12 ` [net-next PATCH v5 08/15] of: mdio: Refactor of_mdiobus_register_phy() Calvin Johnson
2021-02-08 15:12 ` [net-next PATCH v5 09/15] ACPI: utils: Introduce acpi_get_local_address() Calvin Johnson
2021-02-08 15:12 ` [net-next PATCH v5 10/15] net: mdio: Add ACPI support code for mdio Calvin Johnson
2021-02-08 16:16 ` Andy Shevchenko
2021-02-08 15:12 ` [net-next PATCH v5 11/15] net: mdiobus: Introduce fwnode_mdiobus_register() Calvin Johnson
2021-02-08 15:12 ` [net-next PATCH v5 12/15] net/fsl: Use fwnode_mdiobus_register() Calvin Johnson
2021-02-08 15:12 ` [net-next PATCH v5 13/15] phylink: introduce phylink_fwnode_phy_connect() Calvin Johnson
2021-02-08 15:31 ` Russell King - ARM Linux admin
2021-02-15 5:55 ` Calvin Johnson
2021-02-15 6:01 ` Calvin Johnson
2021-02-08 16:20 ` Russell King - ARM Linux admin
2021-02-08 15:12 ` [net-next PATCH v5 14/15] net: phylink: Refactor phylink_of_phy_connect() Calvin Johnson
2021-02-08 15:12 ` [net-next PATCH v5 15/15] net: dpaa2-mac: Add ACPI support for DPAA2 MAC driver Calvin Johnson
2021-02-08 16:21 ` Andy Shevchenko
2021-02-08 16:28 ` Russell King - ARM Linux admin
2021-02-15 12:33 ` Calvin Johnson [this message]
2021-02-15 15:13 ` Andy Shevchenko
2021-02-15 15:15 ` Andy Shevchenko
2021-02-16 9:59 ` Calvin Johnson
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