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| author | Elina Pasheva <epasheva@sierrawireless.com> | 2009-10-16 23:04:54 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-10-31 00:57:33 +0300 |
| commit | 3c77d5137d3f4ff41721e9b4f4812db56a6065c0 (patch) | |
| tree | c64aec5e5d05e7087c8d9703b51d0d3454d2b4c4 /drivers | |
| parent | 40ac7b62d8c132c73a709bd83858b3419f38ec23 (diff) | |
| download | linux-3c77d5137d3f4ff41721e9b4f4812db56a6065c0.tar.xz | |
USB: serial: sierra driver send_setup() autopm fix
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>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/serial/sierra.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c index 45883988a005..3ec79dfc41fd 100644 --- a/drivers/usb/serial/sierra.c +++ b/drivers/usb/serial/sierra.c @@ -296,7 +296,6 @@ struct sierra_port_private { int dsr_state; int dcd_state; int ri_state; - unsigned int opened:1; }; @@ -306,6 +305,8 @@ 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__); @@ -324,10 +325,7 @@ 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; } } @@ -339,12 +337,18 @@ 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, |