net: phylink: move PHY interrupt request to non-fail path
The blamed commit added code which could return an error after we
requested the PHY interrupt. When we return an error, the caller
will call phy_detach() which fails to free the interrupt.
Rearrange the code such that failing operations happen before the
interrupt is requested, thereby allowing phy_detach() to be used.
Note that replacing phy_detach() with phy_disconnect() in these
paths could lead to freeing an interrupt which was never requested.
Fixes: 1942b1c6f687 ("net: phylink: make configuring clock-stop dependent on MAC support")
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/E1ut35k-00000001UEl-0iq6@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index f1b57e3..c7cb95a 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -2141,9 +2141,6 @@ static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy,
__ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported,
__ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising);
- if (phy_interrupt_is_valid(phy))
- phy_request_interrupt(phy);
-
if (pl->config->mac_managed_pm)
phy->mac_managed_pm = true;
@@ -2160,6 +2157,9 @@ static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy,
ret = 0;
}
+ if (ret == 0 && phy_interrupt_is_valid(phy))
+ phy_request_interrupt(phy);
+
return ret;
}
