linux-kernel - [PATCH 1/8] serial: Use ARRAY_SIZE() with iso7816 reserved array

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Date:   Thu,  9 Mar 2023 10:09:16 +0200
From:   Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To:     linux-serial@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>, linux-kernel@...r.kernel.org
Cc:     Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: [PATCH 1/8] serial: Use ARRAY_SIZE() with iso7816 reserved array

Instead of a literal, size the for loop iteration based on the actual
array using ARRAY_SIZE().

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
---
 drivers/tty/serial/serial_core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 2bd32c8ece39..ee2aabcc8943 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -15,6 +15,7 @@
 #include <linux/init.h>
 #include <linux/console.h>
 #include <linux/gpio/consumer.h>
+#include <linux/kernel.h>
 #include <linux/of.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
@@ -1491,7 +1492,7 @@ static int uart_set_iso7816_config(struct uart_port *port,
 	 * There are 5 words reserved for future use. Check that userspace
 	 * doesn't put stuff in there to prevent breakages in the future.
 	 */
-	for (i = 0; i < 5; i++)
+	for (i = 0; i < ARRAY_SIZE(iso7816.reserved); i++)
 		if (iso7816.reserved[i])
 			return -EINVAL;
 
-- 
2.30.2