USB: cdc-wdm: fix wdm_find_device* return value
commit 6a44886899ef8cc396e230e492e6a56a883889f3 upstream.
A logic error made the wdm_find_device* functions
return a bogus pointer into static data instead of
the intended NULL no matching device was found.
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Cc: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 01d247e..524fe24 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -134,12 +134,14 @@
/* return intfdata if we own the interface, else look up intf in the list */
static struct wdm_device *wdm_find_device(struct usb_interface *intf)
{
- struct wdm_device *desc = NULL;
+ struct wdm_device *desc;
spin_lock(&wdm_device_list_lock);
list_for_each_entry(desc, &wdm_device_list, device_list)
if (desc->intf == intf)
- break;
+ goto found;
+ desc = NULL;
+found:
spin_unlock(&wdm_device_list_lock);
return desc;
@@ -147,12 +149,14 @@
static struct wdm_device *wdm_find_device_by_minor(int minor)
{
- struct wdm_device *desc = NULL;
+ struct wdm_device *desc;
spin_lock(&wdm_device_list_lock);
list_for_each_entry(desc, &wdm_device_list, device_list)
if (desc->intf->minor == minor)
- break;
+ goto found;
+ desc = NULL;
+found:
spin_unlock(&wdm_device_list_lock);
return desc;