A bugfix for backward compatibility handling introduced undefined
behavior for the case that of_parse_phandle() does not return
a valid entry, as "gcc -Wmaybe-unused" reports:
drivers/net/ethernet/apm/xgene/xgene_enet_hw.c: In function
'xgene_enet_phy_connect':
drivers/net/ethernet/apm/xgene/xgene_enet_hw.c:776:6: error: 'phy_dev' may be
used uninitialized in this function [-Werror=maybe-uninitialized]
drivers/net/ethernet/apm/xgene/xgene_enet_hw.c: In function
'xgene_enet_mdio_config':
drivers/net/ethernet/apm/xgene/xgene_enet_hw.c:776:6: error: 'phy_dev' may be
used uninitialized in this function [-Werror=maybe-uninitialized]
We can work around this by removing the check for zero "np", as
of_phy_connect() will correctly handle a NULL argument so we fall
back into the normal error handling case.
Note that I had previously fixed another bug that resulted in the
exact same warning, but this is a different problem that was
introduced after my original fix.
Signed-off-by: Arnd Bergmann <a...@arndb.de>
Fixes: 03377e381bf4 ("drivers: net: xgene: Fix backward compatibility")
---
drivers/net/ethernet/apm/xgene/xgene_enet_hw.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
index 321fb197621e..da413c8d3e19 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
@@ -761,10 +761,6 @@ int xgene_enet_phy_connect(struct net_device *ndev)
if (dev->of_node) {
for (i = 0 ; i < 2; i++) {
np = of_parse_phandle(dev->of_node, "phy-handle", i);
-
- if (!np)
- continue;
-
phy_dev = of_phy_connect(ndev, np,
&xgene_enet_adjust_link,
0, pdata->phy_mode);
--
2.9.0
