mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

net: macb: Fix mdio child node detection 

Commit 4d98bb0d7e ("net: macb: Use mdio child node for MDIO bus if it
exists") added code to detect if a 'mdio' child node exists to the macb
driver. Ths added code does, however, not actually check if the child node
exists, but if the parent node exists. This results in errors such as

macb 10090000.ethernet eth0: Could not attach PHY (-19)

if there is no 'mdio' child node. Fix the code to actually check for
the child node.

Fixes: 4d98bb0d7e ("net: macb: Use mdio child node for MDIO bus if it exists")
Cc: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Sean Anderson <sean.anderson@seco.com>
Tested-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20211026173950.353636-1-linux@roeck-us.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Guenter Roeck 2021-10-26 10:39:50 -07:00 committed by Jakub Kicinski
parent 85c0c3eb9a
commit 8db3cbc507
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ethernet/cadence/macb_main.c
View File

@ -901,7 +901,7 @@ static int macb_mdiobus_register(struct macb *bp)
* directly under the MAC node
*/
child = of_get_child_by_name(np, "mdio");
if (np) {
if (child) {
int ret = of_mdiobus_register(bp->mii_bus, child);
of_node_put(child);