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authorJohan Hovold <jhovold@gmail.com>2014-05-26 19:22:50 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-05-27 15:04:02 -0700
commit353fe198602e8b4d1c7bdcceb8e60955087201b1 (patch)
tree9b5ac3edc80cd22332cf85c0b8c28b911246bc9b /drivers
parent549e83500b801dbd274bceec04afe02a0e989fe2 (diff)
downloadlinux-stericsson-353fe198602e8b4d1c7bdcceb8e60955087201b1.tar.gz
USB: sierra: fix AA deadlock in open error path
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") Cc: <stable@vger.kernel.org> # v2.6.31 Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/serial/sierra.c21
1 files changed, 13 insertions, 8 deletions
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index 6b192e602ce0..07cbd985ed65 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -816,14 +816,9 @@ 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;
@@ -833,6 +828,16 @@ 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;
}