[PATCH net-next v11 04/13] net: sfp: Add helper to return the SFP bus name

From: Maxime Chevallier
Date: Thu Apr 04 2024 - 05:31:48 EST


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@xxxxxxxxxxx>
Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
---
V11: - No changes
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