From: Peng Fan <peng.fan@nxp.com>
Date: Sun, 3 May 2020 14:41:13 +0000 (+0800)
Subject: net: eth-uclass: add return value check
X-Git-Tag: v2020.07-rc2~3^2~60
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=d2b70205dd67f32427dde4f1a7a8966f4924dfad;p=oweals%2Fu-boot.git

net: eth-uclass: add return value check

Add return value check

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---

diff --git a/net/eth-uclass.c b/net/eth-uclass.c
index 8bf2eabe90..950a48d520 100644
--- a/net/eth-uclass.c
+++ b/net/eth-uclass.c
@@ -40,8 +40,12 @@ static int eth_errno;
 static struct eth_uclass_priv *eth_get_uclass_priv(void)
 {
 	struct uclass *uc;
+	int ret;
+
+	ret = uclass_get(UCLASS_ETH, &uc);
+	if (ret)
+		return NULL;
 
-	uclass_get(UCLASS_ETH, &uc);
 	assert(uc);
 	return uc->priv;
 }
@@ -102,6 +106,7 @@ struct udevice *eth_get_dev_by_name(const char *devname)
 	struct udevice *it;
 	struct uclass *uc;
 	int len = strlen("eth");
+	int ret;
 
 	/* Must be longer than 3 to be an alias */
 	if (!strncmp(devname, "eth", len) && strlen(devname) > len) {
@@ -109,7 +114,10 @@ struct udevice *eth_get_dev_by_name(const char *devname)
 		seq = simple_strtoul(startp, &endp, 10);
 	}
 
-	uclass_get(UCLASS_ETH, &uc);
+	ret = uclass_get(UCLASS_ETH, &uc);
+	if (ret)
+		return NULL;
+
 	uclass_foreach_dev(it, uc) {
 		/*
 		 * We need the seq to be valid, so try to probe it.