diff options
| author | Elina Pasheva <epasheva@sierrawireless.com> | 2009-10-16 12:04:54 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-11-09 16:22:23 -0800 |
| commit | def3834da355e930d694b7373fe651feb0162cf4 (patch) | |
| tree | 7fdd14474d979c80449df0bef657201633bacea4 /drivers/usb/serial | |
| parent | 2367aa9bfd515bd76728b28d62a0fd00ef70832e (diff) | |
USB: serial: sierra driver send_setup() autopm fix
commit 3c77d5137d3f4ff41721e9b4f4812db56a6065c0 upstream.
This patch presents a fix for the autosuspend feature implementation in
sierra usb serial driver for function sierra_send_setup(). Because it
is possible to call sierra_send_setup() before sierra_open() or after
sierra_close() we added a get/put interface activity to assure that the
usb control can happen even when the device is autosuspended.
Signed-off-by: Elina Pasheva <epasheva@sierrawireless.com>
Tested-by: Matthew Safar <msafar@sierrawireless.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/serial')
| -rw-r--r-- | drivers/usb/serial/sierra.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c index f48d05e0acc1..c5fbaa5dde05 100644 --- a/drivers/usb/serial/sierra.c +++ b/drivers/usb/serial/sierra.c @@ -287,6 +287,8 @@ static int sierra_send_setup(struct usb_serial_port *port) struct sierra_port_private *portdata; __u16 interface = 0; int val = 0; + int do_send = 0; + int retval; dev_dbg(&port->dev, "%s\n", __func__); @@ -305,10 +307,7 @@ static int sierra_send_setup(struct usb_serial_port *port) */ 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); + do_send = 1; } } @@ -320,12 +319,18 @@ static int sierra_send_setup(struct usb_serial_port *port) interface = 1; else if (port->bulk_out_endpointAddress == 5) interface = 2; - return usb_control_msg(serial->dev, - usb_rcvctrlpipe(serial->dev, 0), - 0x22, 0x21, val, interface, - NULL, 0, USB_CTRL_SET_TIMEOUT); + + do_send = 1; } - return 0; + if (!do_send) + return 0; + + usb_autopm_get_interface(serial->interface); + retval = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), + 0x22, 0x21, val, interface, NULL, 0, USB_CTRL_SET_TIMEOUT); + usb_autopm_put_interface(serial->interface); + + return retval; } static void sierra_set_termios(struct tty_struct *tty, |