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path: root/drivers/usb/serial/sierra.c
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Diffstat (limited to 'drivers/usb/serial/sierra.c')
-rw-r--r--drivers/usb/serial/sierra.c24
1 files changed, 17 insertions, 7 deletions
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index d9bf9a5c20e..913225c6161 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -14,7 +14,7 @@
Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
*/
-#define DRIVER_VERSION "v.1.3.2"
+#define DRIVER_VERSION "v.1.3.3"
#define DRIVER_AUTHOR "Kevin Lloyd <klloyd@sierrawireless.com>"
#define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
@@ -259,9 +259,21 @@ static int sierra_send_setup(struct tty_struct *tty,
val |= 0x02;
/* If composite device then properly report interface */
- if (serial->num_ports == 1)
+ if (serial->num_ports == 1) {
interface = sierra_calc_interface(serial);
+ /* Control message is sent only to interfaces with
+ * interrupt_in endpoints
+ */
+ if (port->interrupt_in_urb) {
+ /* send control message */
+ return usb_control_msg(serial->dev,
+ usb_rcvctrlpipe(serial->dev, 0),
+ 0x22, 0x21, val, interface,
+ NULL, 0, USB_CTRL_SET_TIMEOUT);
+ }
+ }
+
/* Otherwise the need to do non-composite mapping */
else {
if (port->bulk_out_endpointAddress == 2)
@@ -270,12 +282,13 @@ static int sierra_send_setup(struct tty_struct *tty,
interface = 1;
else if (port->bulk_out_endpointAddress == 5)
interface = 2;
- }
- return usb_control_msg(serial->dev,
+ return usb_control_msg(serial->dev,
usb_rcvctrlpipe(serial->dev, 0),
0x22, 0x21, val, interface,
NULL, 0, USB_CTRL_SET_TIMEOUT);
+
+ }
}
return 0;
@@ -585,9 +598,6 @@ static int sierra_open(struct tty_struct *tty,
}
}
- if (tty)
- tty->low_latency = 1;
-
sierra_send_setup(tty, port);
/* start up the interrupt endpoint if we have one */