[PATCH v3 29/35] serial: sc12is7xx: optimize sc16is7xx_alloc_line()

[Yury Norov]

Instead of polling every bit in sc16is7xx_lines, use a dedicated
find_and_set_bit(), and make the function a simple one-liner.

Signed-off-by: Yury Norov <yury.norov@xxxxxxxxx>
---
 drivers/tty/serial/sc16is7xx.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index cf0c6120d30e..a7adb6ad0bbd 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -427,15 +427,9 @@ static void sc16is7xx_port_update(struct uart_port *port, u8 reg,
 
 static int sc16is7xx_alloc_line(void)
 {
-	int i;
-
 	BUILD_BUG_ON(SC16IS7XX_MAX_DEVS > BITS_PER_LONG);
 
-	for (i = 0; i < SC16IS7XX_MAX_DEVS; i++)
-		if (!test_and_set_bit(i, &sc16is7xx_lines))
-			break;
-
-	return i;
+	return find_and_set_bit(&sc16is7xx_lines, SC16IS7XX_MAX_DEVS);
 }
 
 static void sc16is7xx_power(struct uart_port *port, int on)
-- 
2.40.1