From: Milan Svoboda <msvoboda@ra.rockwell.com>
Date: Wed, 9 Aug 2006 05:14:43 +0000 (-0700)
Subject: USB gadget: gadgetfs dont try to lock before free
X-Git-Tag: MMI-PSA29.97-13-9~47266^2~62
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a94da8971e836f32315f8832b0bf3e88bee9efae;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

USB gadget: gadgetfs dont try to lock before free

I spotted this during my tests with -rt on arm. The -rt patch contains
some better tools
to diagnose problems with locks and some other things...

Original code tries to take semaphore in BUG_ON and then free the memory
with this semaphore.


Signed-off-by: Milan Svoboda <msvoboda@ra.rockwell.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index ed9b404e5f5a..a38b6af2c358 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -223,7 +223,6 @@ static void put_ep (struct ep_data *data)
 	/* needs no more cleanup */
 	BUG_ON (!list_empty (&data->epfiles));
 	BUG_ON (waitqueue_active (&data->wait));
-	BUG_ON (down_trylock (&data->lock) != 0);
 	kfree (data);
 }