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USB: cdc-wdm: fix wdm_find_device* return value

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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.

Cc: stable <stable@vger.kernel.org> # v3.4+
Cc: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bjørn Mork 2012-09-10 22:17:34 +02:00 committed by Greg Kroah-Hartman
parent f08dea7348
commit 6a44886899
1 changed files with 8 additions and 4 deletions
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12
drivers/usb/class/cdc-wdm.c
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@ -109,12 +109,14 @@ static struct usb_driver wdm_driver;
/* 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;
@ -122,12 +124,14 @@ static struct wdm_device *wdm_find_device(struct usb_interface *intf)
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;