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| author | Elina Pasheva <epasheva@sierrawireless.com> | 2009-10-27 13:49:59 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-10-30 14:57:33 -0700 |
| commit | b64dc0a597fd3c66d888df0886635eba210cc19f (patch) | |
| tree | d267730ea50d7c48eafbe751e1d8841ddb5240f0 /drivers | |
| parent | 3c77d5137d3f4ff41721e9b4f4812db56a6065c0 (diff) | |
| download | lwn-b64dc0a597fd3c66d888df0886635eba210cc19f.tar.gz lwn-b64dc0a597fd3c66d888df0886635eba210cc19f.zip | |
USB: serial: sierra driver autopm fixes
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/serial/sierra.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c index 3ec79dfc41fd..5019325ba25d 100644 --- a/drivers/usb/serial/sierra.c +++ b/drivers/usb/serial/sierra.c @@ -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); } } |