serial: 8250: replace snprintf in show functions with sysfs_emit

coccicheck complains about the use of snprintf() in sysfs show
functions:
WARNING use scnprintf or sprintf

Use sysfs_emit instead of scnprintf or sprintf makes more sense.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Jing Yao <yao.jing2@zte.com.cn>
Link: https://lore.kernel.org/r/20211104114754.30983-1-yao.jing2@zte.com.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 5775cbf..3d58f38 100644 (file)
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -3099,7 +3099,7 @@ static ssize_t rx_trig_bytes_show(struct device *dev,
        if (rxtrig_bytes < 0)
                return rxtrig_bytes;
 
-       return snprintf(buf, PAGE_SIZE, "%d\n", rxtrig_bytes);
+       return sysfs_emit(buf, "%d\n", rxtrig_bytes);
 }
 
 static int do_set_rxtrig(struct tty_port *port, unsigned char bytes)