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Message-ID: <20240304151011.1610175-5-maxime.chevallier@bootlin.com>
Date: Mon, 4 Mar 2024 16:10:00 +0100
From: Maxime Chevallier <maxime.chevallier@...tlin.com>
To: davem@...emloft.net
Cc: Maxime Chevallier <maxime.chevallier@...tlin.com>,
netdev@...r.kernel.org,
linux-kernel@...r.kernel.org,
thomas.petazzoni@...tlin.com,
Andrew Lunn <andrew@...n.ch>,
Jakub Kicinski <kuba@...nel.org>,
Eric Dumazet <edumazet@...gle.com>,
Paolo Abeni <pabeni@...hat.com>,
Russell King <linux@...linux.org.uk>,
linux-arm-kernel@...ts.infradead.org,
Christophe Leroy <christophe.leroy@...roup.eu>,
Herve Codina <herve.codina@...tlin.com>,
Florian Fainelli <f.fainelli@...il.com>,
Heiner Kallweit <hkallweit1@...il.com>,
Vladimir Oltean <vladimir.oltean@....com>,
Köry Maincent <kory.maincent@...tlin.com>,
Jesse Brandeburg <jesse.brandeburg@...el.com>,
Jonathan Corbet <corbet@....net>,
Marek Behún <kabel@...nel.org>,
Piergiorgio Beruto <piergiorgio.beruto@...il.com>,
Oleksij Rempel <o.rempel@...gutronix.de>,
Nicolò Veronese <nicveronese@...il.com>,
Simon Horman <horms@...nel.org>,
mwojtas@...omium.org
Subject: [PATCH net-next v10 04/13] net: sfp: Add helper to return the SFP bus name
Knowing the bus name is helpful when we want to expose the link topology
to userspace, add a helper to return the SFP bus name.
Signed-off-by: Maxime Chevallier <maxime.chevallier@...tlin.com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
---
V10: - No changes
V9: - No changes
V8: - No changes
V7: - No changes
V6: - No changes
V5: - Added Andrew's R-b
V4: - No changes
V3: - Added RTNL assert
drivers/net/phy/sfp-bus.c | 11 +++++++++++
include/linux/sfp.h | 6 ++++++
2 files changed, 17 insertions(+)
diff --git a/drivers/net/phy/sfp-bus.c b/drivers/net/phy/sfp-bus.c
index e05013aeecc3..413021619afe 100644
--- a/drivers/net/phy/sfp-bus.c
+++ b/drivers/net/phy/sfp-bus.c
@@ -859,3 +859,14 @@ void sfp_unregister_socket(struct sfp_bus *bus)
sfp_bus_put(bus);
}
EXPORT_SYMBOL_GPL(sfp_unregister_socket);
+
+const char *sfp_get_name(struct sfp_bus *bus)
+{
+ ASSERT_RTNL();
+
+ if (bus->sfp_dev)
+ return dev_name(bus->sfp_dev);
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(sfp_get_name);
diff --git a/include/linux/sfp.h b/include/linux/sfp.h
index 0573e53b0c11..55c0ab17c9e2 100644
--- a/include/linux/sfp.h
+++ b/include/linux/sfp.h
@@ -570,6 +570,7 @@ struct sfp_bus *sfp_bus_find_fwnode(const struct fwnode_handle *fwnode);
int sfp_bus_add_upstream(struct sfp_bus *bus, void *upstream,
const struct sfp_upstream_ops *ops);
void sfp_bus_del_upstream(struct sfp_bus *bus);
+const char *sfp_get_name(struct sfp_bus *bus);
#else
static inline int sfp_parse_port(struct sfp_bus *bus,
const struct sfp_eeprom_id *id,
@@ -648,6 +649,11 @@ static inline int sfp_bus_add_upstream(struct sfp_bus *bus, void *upstream,
static inline void sfp_bus_del_upstream(struct sfp_bus *bus)
{
}
+
+static inline const char *sfp_get_name(struct sfp_bus *bus)
+{
+ return NULL;
+}
#endif
#endif
--
2.44.0
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