diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/serial/cp210x.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c index b1e5db161487..7175bb107dec 100644 --- a/drivers/usb/serial/cp210x.c +++ b/drivers/usb/serial/cp210x.c @@ -280,7 +280,10 @@ static int cp210x_get_config(struct usb_serial_port *port, u8 request, dbg("%s - Unable to send config request, " "request=0x%x size=%d result=%d\n", __func__, request, size, result); - return -EPROTO; + if (result > 0) + result = -EPROTO; + + return result; } return 0; @@ -331,7 +334,10 @@ static int cp210x_set_config(struct usb_serial_port *port, u8 request, dbg("%s - Unable to send request, " "request=0x%x size=%d result=%d\n", __func__, request, size, result); - return -EPROTO; + if (result > 0) + result = -EPROTO; + + return result; } return 0; @@ -395,10 +401,11 @@ static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) dbg("%s - port %d", __func__, port->number); - if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) { - dev_err(&port->dev, "%s - Unable to enable UART\n", - __func__); - return -EPROTO; + result = cp210x_set_config_single(port, CP210X_IFC_ENABLE, + UART_ENABLE); + if (result) { + dev_err(&port->dev, "%s - Unable to enable UART\n", __func__); + return result; } result = usb_serial_generic_open(tty, port); |