path: root/drivers/net
diff options
authorKangjie Lu <kjlu@umn.edu>2019-03-12 02:43:18 -0500
committerDavid S. Miller <davem@davemloft.net>2019-03-12 14:51:02 -0700
commit035a14e71f27eefa50087963b94cbdb3580d08bf (patch)
tree7c8b035774a447e08c8e8699bec9b071383117f9 /drivers/net
parentnet: 8390: fix potential NULL pointer dereferences (diff)
net: sh_eth: fix a missing check of of_get_phy_mode
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>
Diffstat (limited to 'drivers/net')
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index 339b2eae2100..e33af371b169 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -3181,12 +3181,16 @@ 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)