netdev - [PATCH net v2 3/3] phy: fix xa_alloc

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Message-ID: <20250312095251.2554708-4-michal.swiatkowski@linux.intel.com>
Date: Wed, 12 Mar 2025 10:52:51 +0100
From: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
To: netdev@...r.kernel.org
Cc: jiri@...nulli.us,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	horms@...nel.org,
	pierre@...ckhpc.com,
	hkallweit1@...il.com,
	linux@...linux.org.uk,
	maxime.chevallier@...tlin.com,
	christophe.leroy@...roup.eu,
	arkadiusz.kubalewski@...el.com,
	vadim.fedorenko@...ux.dev,
	Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
Subject: [PATCH net v2 3/3] phy: fix xa_alloc_cyclic() error handling

xa_alloc_cyclic() can return 1, which isn't an error. To prevent
situation when the caller of this function will treat it as no error do
a check only for negative here.

Fixes: 384968786909 ("net: phy: Introduce ethernet link topology representation")
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
---
 drivers/net/phy/phy_link_topology.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/phy/phy_link_topology.c b/drivers/net/phy/phy_link_topology.c
index 4a5d73002a1a..0e9e987f37dd 100644
--- a/drivers/net/phy/phy_link_topology.c
+++ b/drivers/net/phy/phy_link_topology.c
@@ -73,7 +73,7 @@ int phy_link_topo_add_phy(struct net_device *dev,
 				      xa_limit_32b, &topo->next_phy_index,
 				      GFP_KERNEL);
 
-	if (ret)
+	if (ret < 0)
 		goto err;
 
 	return 0;
-- 
2.42.0