[PATCH net v4 0/2] net: phy: sfp/mdio-i2c: defer RollBall probe + fix mii_bus leak

[Petr Wozniak <petr.wozniak@gmail.com>]

This series resends the RollBall bridge probe deferral (a fix for the
regression in commit 8fe125892f40) and adds a related mii_bus leak fix.

Patch 1 fixes a pre-existing mii_bus leak in sfp_i2c_mdiobus_destroy()
that has been present since the helper was introduced in 2022. Patch 2
introduces a new -ENODEV path that destroys the MDIO bus via
sfp_i2c_mdiobus_destroy(), so patch 1 is a prerequisite to avoid leaking
the bus on that path.

v4:
 - Retargeted net-next -> net: both patches carry Fixes: tags and
   8fe125892f40 is now in mainline.
 - Patch 1: added Reviewed-by: Maxime Chevallier.
 - Patch 2: reworked post-probe error handling to drop an over-80-column
   line and moved two block comment terminators to their own line
   (checkpatch); set err = 0 after switching to MDIO_I2C_NONE so the SFP
   state machine does not schedule a redundant 1 s retry. No functional
   change to the probe logic.
v3:
 - Resend: v2 defer patch was corrupted in transit and failed to apply
   (netdev/apply); regenerated against current net-next.
 - Fixed block comment style flagged by checkpatch. No functional change.
 - Added patch 1/2 (sfp: free mii_bus in sfp_i2c_mdiobus_destroy).
v2 (defer):
 - Generalized scope: regression affects boot-inserted and hotplugged
   modules where bridge init exceeds 200 ms; Aleksander Bajkowski
   confirmed FLYPRO SFP-10GT-CS-30M / AQR113C broken when hotplugged.
 - Corrected state machine description (probe runs in SFP_S_INIT after
   SFP_S_WAIT) - Jan Hoffmann.
 - No code changes from v1.
v1: initial submission.

Petr Wozniak (2):
  net: phy: sfp: free mii_bus in sfp_i2c_mdiobus_destroy
  net: phy: mdio-i2c: defer RollBall bridge probe to PHY discovery

 drivers/net/mdio/mdio-i2c.c   | 15 +++++++++------
 drivers/net/phy/sfp.c         | 23 +++++++++++++++--------
 include/linux/mdio/mdio-i2c.h |  1 +
 3 files changed, 25 insertions(+), 14 deletions(-)

-- 
2.51.0