[PATCH] [media] rainshadow-cec: use strlcat instead of strncat

[Arnd Bergmann]

gcc warns about an obviously incorrect use of strncat():

drivers/media/usb/rainshadow-cec/rainshadow-cec.c: In function 
'rain_cec_adap_transmit':
drivers/media/usb/rainshadow-cec/rainshadow-cec.c:299:4: error: specified bound 
48 equals the size of the destination [-Werror=stringop-overflow=]

It seems that strlcat was intended here, and using that makes the
code correct.

Fixes: 0f314f6c2e77 ("[media] rainshadow-cec: new RainShadow Tech HDMI CEC 
driver")
Signed-off-by: Arnd Bergmann <a...@arndb.de>
---
 drivers/media/usb/rainshadow-cec/rainshadow-cec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/usb/rainshadow-cec/rainshadow-cec.c 
b/drivers/media/usb/rainshadow-cec/rainshadow-cec.c
index 541ca543f71f..dc1f64f904cd 100644
--- a/drivers/media/usb/rainshadow-cec/rainshadow-cec.c
+++ b/drivers/media/usb/rainshadow-cec/rainshadow-cec.c
@@ -296,7 +296,7 @@ static int rain_cec_adap_transmit(struct cec_adapter *adap, 
u8 attempts,
                         cec_msg_destination(msg), msg->msg[1]);
                for (i = 2; i < msg->len; i++) {
                        snprintf(hex, sizeof(hex), "%02x", msg->msg[i]);
-                       strncat(cmd, hex, sizeof(cmd));
+                       strlcat(cmd, hex, sizeof(cmd));
                }
        }
        mutex_lock(&rain->write_lock);
-- 
2.9.0