From: Chen Gang <gang.chen@asianux.com>
Date: Wed, 19 Dec 2012 01:18:57 +0000 (+0800)
Subject: USB: ohci: set urb->hcpriv = NULL immediately, after free it
X-Git-Tag: firefly_0821_release~3680^2~1079^2~72
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ece1d77ed73b335319725f1d5ffa72ca3fa9b05c;p=firefly-linux-kernel-4.4.55.git

USB: ohci: set urb->hcpriv = NULL immediately, after free it

although we can not say it is surely a bug.
it is better to set urb->hcpriv = NULL, after finish calling
urb_free_priv.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/host/ohci-q.c b/drivers/usb/host/ohci-q.c
index 7482cfbe8c5e..88731b7c5f42 100644
--- a/drivers/usb/host/ohci-q.c
+++ b/drivers/usb/host/ohci-q.c
@@ -44,6 +44,7 @@ __acquires(ohci->lock)
 	// ASSERT (urb->hcpriv != 0);
 
 	urb_free_priv (ohci, urb->hcpriv);
+	urb->hcpriv = NULL;
 	if (likely(status == -EINPROGRESS))
 		status = 0;