From: Kangjie Lu kjlu@umn.edu
[ Upstream commit 035a14e71f27eefa50087963b94cbdb3580d08bf ]
of_get_phy_mode may fail and return a negative error code; the fix checks the return value of of_get_phy_mode and returns NULL of it fails.
Fixes: b356e978e92f ("sh_eth: add device tree support") Signed-off-by: Kangjie Lu kjlu@umn.edu Reviewed-by: Sergei Shtylyov sergei.shtylyov@cogentembedded.com Reviewed-by: Geert Uytterhoeven geert+renesas@glider.be Tested-by: Geert Uytterhoeven geert+renesas@glider.be Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/renesas/sh_eth.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c index 2d9f4ed9a65e..8413f93f5cd9 100644 --- a/drivers/net/ethernet/renesas/sh_eth.c +++ b/drivers/net/ethernet/renesas/sh_eth.c @@ -3040,12 +3040,16 @@ static struct sh_eth_plat_data *sh_eth_parse_dt(struct device *dev) struct device_node *np = dev->of_node; struct sh_eth_plat_data *pdata; const char *mac_addr; + int ret;
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return NULL;
- pdata->phy_interface = of_get_phy_mode(np); + ret = of_get_phy_mode(np); + if (ret < 0) + return NULL; + pdata->phy_interface = ret;
mac_addr = of_get_mac_address(np); if (mac_addr)