powerpc/mpc5121: fix NULL test in mpc5121_clk_get utility function.

strcmp on NULL results in a segmentation fault, also, remove the second,
redundant test on dev

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/powerpc/platforms/512x/clock.c b/arch/powerpc/platforms/512x/clock.c
index f416014ee727..1bcff94eb924 100644
--- a/arch/powerpc/platforms/512x/clock.c
+++ b/arch/powerpc/platforms/512x/clock.c
@@ -56,12 +56,12 @@ static struct clk *mpc5121_clk_get(struct device *dev, const char *id)
         int dev_match = 0;
         int id_match = 0;
 
-        if (dev == NULL && id == NULL)
+        if (dev == NULL || id == NULL)
                 return NULL;
 
         mutex_lock(&clocks_mutex);
         list_for_each_entry(p, &clocks, node) {
-                if (dev && dev == p->dev)
+                if (dev == p->dev)
                         dev_match++;
                 if (strcmp(id, p->name) == 0)
                         id_match++;