diff options
| author | Johan Hovold <jhovold@gmail.com> | 2014-05-26 19:22:50 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-06-30 20:01:32 -0700 |
| commit | 3c3d7a87ae8efae4491d15e9de2735f803b9c30a (patch) | |
| tree | 159daeb556a567c6b46154cb075dfa1bf2325576 | |
| parent | 9e91351f9626fe1822c5d6e8c10cece4d5e92d1d (diff) | |
USB: sierra: fix AA deadlock in open error path
commit 353fe198602e8b4d1c7bdcceb8e60955087201b1 upstream.
Fix AA deadlock in open error path that would call close() and try to
grab the already held disc_mutex.
Fixes: b9a44bc19f48 ("sierra: driver urb handling improvements")
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/serial/sierra.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c index 3f5e4a73ddd..3ed84591cc0 100644 --- a/drivers/usb/serial/sierra.c +++ b/drivers/usb/serial/sierra.c @@ -867,14 +867,9 @@ static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port) usb_sndbulkpipe(serial->dev, endpoint) | USB_DIR_IN); err = sierra_submit_rx_urbs(port, GFP_KERNEL); - if (err) { - /* get rid of everything as in close */ - sierra_close(port); - /* restore balance for autopm */ - if (!serial->disconnected) - usb_autopm_put_interface(serial->interface); - return err; - } + if (err) + goto err_submit; + sierra_send_setup(port); serial->interface->needs_remote_wakeup = 1; @@ -884,6 +879,16 @@ static int sierra_open(struct tty_struct *tty, struct usb_serial_port *port) usb_autopm_put_interface(serial->interface); return 0; + +err_submit: + sierra_stop_rx_urbs(port); + + for (i = 0; i < portdata->num_in_urbs; i++) { + sierra_release_urb(portdata->in_urbs[i]); + portdata->in_urbs[i] = NULL; + } + + return err; } |