diff options
| -rw-r--r-- | drivers/usb/serial/ch341.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c index db39b6a6d247..0397f44f8dd3 100644 --- a/drivers/usb/serial/ch341.c +++ b/drivers/usb/serial/ch341.c @@ -179,8 +179,12 @@ static int ch341_set_baudrate_lcr(struct usb_device *dev, /* * CH341A buffers data until a full endpoint-size packet (32 bytes) * has been received unless bit 7 is set. + * + * At least one device with version 0x27 appears to have this bit + * inverted. */ - a |= BIT(7); + if (priv->version > 0x27) + a |= BIT(7); r = ch341_control_out(dev, CH341_REQ_WRITE_REG, 0x1312, a); if (r) |