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 72c88aa..ab50885 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -477,6 +477,10 @@
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 @@
data->hs_desc.bDescriptorType = 0;
usb_ep_disable(data->ep);
}
+ up (&data->lock);
put_ep (data);
return 0;
}