crypto: cavium/nitrox - Fix 'nitrox_get_first_device()' when ndevlist is fully iterated

commit 320bdbd816156f9ca07e5fed7bfb449f2908dda7 upstream.

When a list is completely iterated with 'list_for_each_entry(x, ...)', x is
not NULL at the end.

While at it, remove a useless initialization of the ndev variable. It
is overridden by 'list_for_each_entry'.

Fixes: f2663872f073 ("crypto: cavium - Register the CNN55XX supported crypto algorithms.")
Cc: <stable@vger.kernel.org>
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/crypto/cavium/nitrox/nitrox_main.c b/drivers/crypto/cavium/nitrox/nitrox_main.c
index fee7cb2ce747c77e97b7a8f4a62eeb452b263147..a81f3c7e941d9c44d73c48312a2bc3af0cd7d436 100644 (file)
--- a/drivers/crypto/cavium/nitrox/nitrox_main.c
+++ b/drivers/crypto/cavium/nitrox/nitrox_main.c
@@ -183,7 +183,7 @@ static void nitrox_remove_from_devlist(struct nitrox_device *ndev)
 
 struct nitrox_device *nitrox_get_first_device(void)
 {
-       struct nitrox_device *ndev = NULL;
+       struct nitrox_device *ndev;
 
        mutex_lock(&devlist_lock);
        list_for_each_entry(ndev, &ndevlist, list) {
@@ -191,7 +191,7 @@ struct nitrox_device *nitrox_get_first_device(void)
                        break;
        }
        mutex_unlock(&devlist_lock);
-       if (!ndev)
+       if (&ndev->list == &ndevlist)
                return NULL;
 
        refcount_inc(&ndev->refcnt);