dm: eth: Correctly detect alias in eth_get_dev_by_name()
When given a device name string, we should test to see if it is
really an alias like "eth#".
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/net/eth.c b/net/eth.c
index c46a8c3..26520d3 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -195,10 +195,11 @@
const char *startp = NULL;
struct udevice *it;
struct uclass *uc;
+ int len = strlen("eth");
/* Must be longer than 3 to be an alias */
- if (strlen(devname) > strlen("eth")) {
- startp = devname + strlen("eth");
+ if (!strncmp(devname, "eth", len) && strlen(devname) > len) {
+ startp = devname + len;
seq = simple_strtoul(startp, &endp, 10);
}