diff options
| author | Johan Hovold <jhovold@gmail.com> | 2014-05-26 19:23:10 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-27 15:04:05 -0700 |
| commit | acf47d4f9c39b1cba467aa9442fc2efe0b1da741 (patch) | |
| tree | 1bd6c36ba7e746904685ab0ef6627eef0b682af4 | |
| parent | c2e45d704723723e5691c7b4bcd0ff4aeb813522 (diff) | |
| download | blackbird-op-linux-acf47d4f9c39b1cba467aa9442fc2efe0b1da741.tar.gz blackbird-op-linux-acf47d4f9c39b1cba467aa9442fc2efe0b1da741.zip | |
USB: option: fix runtime PM handling
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@vger.kernel.org> # v2.6.32
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/serial/option.c | 11 |
1 files changed, 10 insertions, 1 deletions
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); |
