3.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Johan Hovold <jhovold@xxxxxxxxx>
commit 014333f77c0b71123d6ef7d31a9724e0699c9548 upstream.
The delayed-write queue was never emptied on disconnect, something which
would lead to leaked urbs and transfer buffers if the device is
disconnected before being runtime resumed due to a write.
Fixes: e6929a9020ac ("USB: support for autosuspend in sierra while
online")
Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/serial/sierra.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -801,6 +801,7 @@ static void sierra_close(struct usb_seri
struct usb_serial *serial = port->serial;
struct sierra_port_private *portdata;
struct sierra_intf_private *intfdata = port->serial->private;
+ struct urb *urb;
dev_dbg(&port->dev, "%s\n", __func__);
@@ -825,6 +826,17 @@ static void sierra_close(struct usb_seri
portdata->opened = 0;
spin_unlock_irq(&intfdata->susp_lock);
+ for (;;) {
+ urb = usb_get_from_anchor(&portdata->delayed);
+ if (!urb)
+ break;
+ kfree(urb->transfer_buffer);
+ usb_free_urb(urb);
+ usb_autopm_put_interface_async(serial->interface);
+ spin_lock(&portdata->lock);
+ portdata->outstanding_urbs--;
+ spin_unlock(&portdata->lock);
+ }
/* Stop reading urbs */
sierra_stop_rx_urbs(port);
--
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