From: Pali Rohár <pali@xxxxxxxxxx>
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@xxxxxxxxxx>
Tested-by: Marek Behún <kabel@xxxxxxxxxx>
---
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
