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

[Christophe JAILLET]

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

Introduce an intermediate variable and test it instead, in order to
reliably know if something was found or not.

Fixes: f2663872f073 ("crypto: cavium - Register the CNN55XX supported crypto 
algorithms.")
Signed-off-by: Christophe JAILLET <christophe.jail...@wanadoo.fr>
---
 drivers/crypto/cavium/nitrox/nitrox_main.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/crypto/cavium/nitrox/nitrox_main.c 
b/drivers/crypto/cavium/nitrox/nitrox_main.c
index 788c6607078b..172cafe7c039 100644
--- a/drivers/crypto/cavium/nitrox/nitrox_main.c
+++ b/drivers/crypto/cavium/nitrox/nitrox_main.c
@@ -278,15 +278,18 @@ 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;
+       bool found = false;
 
        mutex_lock(&devlist_lock);
        list_for_each_entry(ndev, &ndevlist, list) {
-               if (nitrox_ready(ndev))
+               if (nitrox_ready(ndev)) {
+                       found = true;
                        break;
+               }
        }
        mutex_unlock(&devlist_lock);
-       if (!ndev)
+       if (!found)
                return NULL;
 
        refcount_inc(&ndev->refcnt);
-- 
2.25.1