[PATCH 5/7] USB: serial: ftdi_sio: Fix baudrate rounding for ASYNC_SPD_CUST

["Marek Behún" <kabel@kernel.org>]

From: Pali Rohár <pali@kernel.org>

Use DIV_ROUND_CLOSEST() for more accurate baudrate calculation for
ASYNC_SPD_CUST instead of rounding it just down.

Signed-off-by: Pali Rohár <pali@kernel.org>
Tested-by: Marek Behún <kabel@kernel.org>
---
 drivers/usb/serial/ftdi_sio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 30744d5779e2..ac84d5779966 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1317,7 +1317,7 @@ static u32 get_ftdi_divisor(struct tty_struct *tty,
 	if (baud == 38400 &&
 	    ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) &&
 	     (priv->custom_divisor)) {
-		baud = priv->baud_base / priv->custom_divisor;
+		baud = DIV_ROUND_CLOSEST(priv->baud_base, priv->custom_divisor);
 		dev_dbg(dev, "%s - custom divisor %d sets baud rate to %d\n",
 			__func__, priv->custom_divisor, baud);
 	}
-- 
2.35.1