caif_usb: use strlcpy() instead of strncpy()

gcc-8 reports

net/caif/caif_usb.c: In function 'cfusbl_device_notify':
./include/linux/string.h:245:9: warning: '__builtin_strncpy' output may
be truncated copying 15 bytes from a string of length 15
[-Wstringop-truncation]

The compiler require that the input param 'len' of strncpy() should be
greater than the length of the src string, so that '\0' is copied as
well. We can just use strlcpy() to avoid this warning.

Signed-off-by: Xiongfeng Wang <xiongfeng.wang@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/caif/caif_usb.c b/net/caif/caif_usb.c
index 5cd44f001f6479a5e5ec9d02cfc417b899b05e9d..1a082a946045e53f1617cc9a814bae5dcb9784e7 100644 (file)
--- a/net/caif/caif_usb.c
+++ b/net/caif/caif_usb.c
@@ -176,9 +176,7 @@ static int cfusbl_device_notify(struct notifier_block *me, unsigned long what,
                dev_add_pack(&caif_usb_type);
        pack_added = true;
 
-       strncpy(layer->name, dev->name,
-                       sizeof(layer->name) - 1);
-       layer->name[sizeof(layer->name) - 1] = 0;
+       strlcpy(layer->name, dev->name, sizeof(layer->name));
 
        return 0;
 }