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USB: serial: sierra driver autopm fixes

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This patch presents fixes for the autosuspend feature implementation in
sierra usb serial driver in  functions sierra_open(), sierra_close() and
stop_read_write_urbs().

The patch "sierra_close() must resume the device before it notifies it
of a closure" submitted by Oliver Neukum on Wed, October 14 has been
merged as fix in sierra_close() function.

The bug fix  in sierra_open() function restores the autopm interface
state on error condition.

The bug fix in in stop_read_write_urbs() function assures that both
receive and interrupt urbs are recycled.

Signed-off-by: Elina Pasheva <epasheva@sierrawireless.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Elina Pasheva 2009-10-27 13:49:59 -07:00 committed by Greg Kroah-Hartman
parent 3c77d5137d
commit b64dc0a597
1 changed files with 8 additions and 6 deletions
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14
drivers/usb/serial/sierra.c
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@ -777,8 +777,11 @@ static void sierra_close(struct usb_serial_port *port)
if (serial->dev) {
mutex_lock(&serial->disc_mutex);
if (!serial->disconnected)
if (!serial->disconnected) {
serial->interface->needs_remote_wakeup = 0;
usb_autopm_get_interface(serial->interface);
sierra_send_setup(port);
}
mutex_unlock(&serial->disc_mutex);
spin_lock_irq(&intfdata->susp_lock);
portdata->opened = 0;
@ -792,8 +795,6 @@ static void sierra_close(struct usb_serial_port *port)
sierra_release_urb(portdata->in_urbs[i]);
portdata->in_urbs[i] = NULL;
}
usb_autopm_get_interface(serial->interface);
serial->interface->needs_remote_wakeup = 0;
}
}
@ -831,6 +832,8 @@ static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port)
if (err) {
/* get rid of everything as in close */
sierra_close(port);
/* restore balance for autopm */
usb_autopm_put_interface(serial->interface);
return err;
}
sierra_send_setup(port);
@ -919,7 +922,7 @@ static void sierra_release(struct usb_serial *serial)
#ifdef CONFIG_PM
static void stop_read_write_urbs(struct usb_serial *serial)
{
int i, j;
int i;
struct usb_serial_port *port;
struct sierra_port_private *portdata;
@ -927,8 +930,7 @@ static void stop_read_write_urbs(struct usb_serial *serial)
for (i = 0; i < serial->num_ports; ++i) {
port = serial->port[i];
portdata = usb_get_serial_port_data(port);
for (j = 0; j < N_IN_URB; j++)
usb_kill_urb(portdata->in_urbs[j]);
sierra_stop_rx_urbs(port);
usb_kill_anchored_urbs(&portdata->active);
}
}