usb: wusbcore: clean up the sg list that was created for out transfers

Clean up the SG list after transfer completetion for out transfers if one
was created by the HWA.

Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/usb/wusbcore/wa-xfer.c b/drivers/usb/wusbcore/wa-xfer.c
index f614fb1ed77f..61b0597c399b 100644
--- a/drivers/usb/wusbcore/wa-xfer.c
+++ b/drivers/usb/wusbcore/wa-xfer.c
@@ -520,6 +520,10 @@ static void wa_seg_dto_cb(struct urb *urb)
         unsigned rpipe_ready = 0;
         u8 done = 0;
 
+        /* free the sg if it was used. */
+        kfree(urb->sg);
+        urb->sg = NULL;
+
         switch (urb->status) {
         case 0:
                 spin_lock_irqsave(&xfer->lock, flags);