From: Pali Rohár <pali@xxxxxxxxxx>
More FTDI variants limit the minimal baudrate value. Add lower bound
checks.
Signed-off-by: Pali Rohár <pali@xxxxxxxxxx>
Tested-by: Marek Behún <kabel@xxxxxxxxxx>
---
drivers/usb/serial/ftdi_sio.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index ea40f367e70c..717b97f4e094 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1330,7 +1330,7 @@ static u32 get_ftdi_divisor(struct tty_struct *tty,
}
break;
case FT8U232AM: /* 8U232AM chip */
- if (baud <= 3000000) {
+ if (baud >= 183 && baud <= 3000000) {
div_value = ftdi_232am_baud_to_divisor(baud);
} else {
dev_dbg(dev, "%s - Baud rate too high!\n", __func__);
@@ -1343,7 +1343,7 @@ static u32 get_ftdi_divisor(struct tty_struct *tty,
case FT2232C: /* FT2232C chip */
case FT232RL: /* FT232RL chip */
case FTX: /* FT-X series */
- if (baud <= 3000000) {
+ if (baud >= 183 && baud <= 3000000) {
u16 product_id = le16_to_cpu(
port->serial->dev->descriptor.idProduct);
if (((product_id == FTDI_NDI_HUC_PID) ||
@@ -1367,7 +1367,7 @@ static u32 get_ftdi_divisor(struct tty_struct *tty,
case FT232H: /* FT232H chip */
if ((baud <= 12000000) && (baud >= 1200)) {
div_value = ftdi_2232h_baud_to_divisor(baud);
- } else if (baud < 1200) {
+ } else if (baud >= 183 && baud < 1200) {
div_value = ftdi_232bm_baud_to_divisor(baud);
} else {
dev_dbg(dev, "%s - Baud rate too high!\n", __func__);
--
2.35.1
