Fix potential I/O while runtime suspended due to missing PM operations
in send_setup.
Fixes: 383cedc3bb43 ("USB: serial: full autosuspend support for the
option driver")
Cc: <stable@xxxxxxxxxxxxxxx> # v2.6.32
Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx>
---
drivers/usb/serial/option.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index f213ee978516..802c0693e5c9 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -1923,6 +1923,7 @@ static int option_send_setup(struct usb_serial_port *port)
struct option_private *priv = intfdata->private;
struct usb_wwan_port_private *portdata;
int val = 0;
+ int res;
portdata = usb_get_serial_port_data(port);
@@ -1931,9 +1932,17 @@ static int option_send_setup(struct usb_serial_port *port)
if (portdata->rts_state)
val |= 0x02;
- return usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ res = usb_autopm_get_interface(serial->interface);
+ if (res)
+ return res;
+
+ res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
0x22, 0x21, val, priv->bInterfaceNumber, NULL,
0, USB_CTRL_SET_TIMEOUT);
+
+ usb_autopm_put_interface(serial->interface);
+
+ return res;
}
MODULE_AUTHOR(DRIVER_AUTHOR);
--
1.8.5.5
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