[PATCH 03/33] Staging: gdm724x: use match_string() helper

[Yisheng Xie]

match_string() returns the index of an array for a matching string,
which can be used intead of open coded variant.

Cc: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Cc: Quytelda Kahja <quytelda at tamalin.org>
Cc: devel at driverdev.osuosl.org
Signed-off-by: Yisheng Xie <xieyisheng1 at huawei.com>
---
 drivers/staging/gdm724x/gdm_tty.c | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/drivers/staging/gdm724x/gdm_tty.c b/drivers/staging/gdm724x/gdm_tty.c
index 3cdebb8..ba53a06 100644
--- a/drivers/staging/gdm724x/gdm_tty.c
+++ b/drivers/staging/gdm724x/gdm_tty.c
@@ -65,22 +65,14 @@ static int gdm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
 {
 	struct gdm *gdm = NULL;
 	int ret;
-	int i;
-	int j;
-
-	j = GDM_TTY_MINOR;
-	for (i = 0; i < TTY_MAX_COUNT; i++) {
-		if (!strcmp(tty->driver->driver_name, DRIVER_STRING[i])) {
-			j = tty->index;
-			break;
-		}
-	}
 
-	if (j == GDM_TTY_MINOR)
+	ret = match_string((const char **)DRIVER_STRING,
+			   TTY_MAX_COUNT, tty->driver->driver_name);
+	if (ret < 0 || tty->index == GDM_TTY_MINOR)
 		return -ENODEV;
 
 	mutex_lock(&gdm_table_lock);
-	gdm = gdm_table[i][j];
+	gdm = gdm_table[ret][tty->index];
 	if (!gdm) {
 		mutex_unlock(&gdm_table_lock);
 		return -ENODEV;
-- 
1.7.12.4