From: Milan Svoboda <msvoboda@ra.rockwell.com>
Date: Mon, 26 Jun 2006 14:48:00 +0000 (-0700)
Subject: USB: gadgetfs: protect ep_release with lock
X-Git-Tag: v2.6.19-rc1~899^2~79
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ba307f5828b1b4a1348d99c4f430a0cf3beeae2f;p=linux-2.6

USB: gadgetfs: protect ep_release with lock

This patch adds mutex protection to ep_release.

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 72c88aa94d..ab508858f3 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -477,6 +477,10 @@ static int
 ep_release (struct inode *inode, struct file *fd)
 {
 	struct ep_data		*data = fd->private_data;
+	int value;
+
+	if ((value = down_interruptible(&data->lock)) < 0)
+		return value;
 
 	/* clean up if this can be reopened */
 	if (data->state != STATE_EP_UNBOUND) {
@@ -485,6 +489,7 @@ ep_release (struct inode *inode, struct file *fd)
 		data->hs_desc.bDescriptorType = 0;
 		usb_ep_disable(data->ep);
 	}
+	up (&data->lock);
 	put_ep (data);
 	return 0;
 }