USB: serial: ch341: add debug output for chip version

Will probably be helpful if there are any more compatibility issues.

Signed-off-by: Aidan Thornton <makosoft@gmail.com>
Reviewed-by: Grigori Goronzy <greg@chown.ath.cx>
Signed-off-by: Johan Hovold <johan@kernel.org>

diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c
index af9edbedfd28b50e531bac199fb55682f244cfc0..2597b83a8ae254d0eff28b2d2d124ff51c196248 100644 (file)
--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -212,6 +212,7 @@ static int ch341_configure(struct usb_device *dev, struct ch341_private *priv)
        r = ch341_control_in(dev, CH341_REQ_READ_VERSION, 0, 0, buffer, size);
        if (r < 0)
                goto out;
+       dev_dbg(&dev->dev, "Chip version: 0x%02x\n", buffer[0]);
 
        r = ch341_control_out(dev, CH341_REQ_SERIAL_INIT, 0, 0);
        if (r < 0)