1 files changed, 11 insertions, 2 deletions

diff --git a/drivers/spi/spi_mpc83xx.c b/drivers/spi/spi_mpc83xx.c
index ab7ee445d8b2..ac0e3e4b3c54 100644
--- a/drivers/spi/spi_mpc83xx.c
+++ b/drivers/spi/spi_mpc83xx.c
@@ -312,11 +312,20 @@ static int mpc83xx_spi_bufs(struct spi_device *spi, struct spi_transfer *t)
         if (t->bits_per_word)
                 bits_per_word = t->bits_per_word;
         len = t->len;
-        if (bits_per_word > 8)
+        if (bits_per_word > 8) {
+                /* invalid length? */
+                if (len & 1)
+                        return -EINVAL;
                 len /= 2;
-        if (bits_per_word > 16)
+        }
+        if (bits_per_word > 16) {
+                /* invalid length? */
+                if (len & 1)
+                        return -EINVAL;
                 len /= 2;
+        }
         mpc83xx_spi->count = len;
+
         INIT_COMPLETION(mpc83xx_spi->done);
 
         /* enable rx ints */