Preheat oven to 350°F (175°C). Grease and flour 9-inch cake pans.

In a large bowl, combine flour, salt, cinnamon, and soda.

Add sugar, eggs, and oil to the dry ingredients.

Stir until just moistened; do not beat.

Stir in vanilla, crushed pineapple (undrained), chopped pecans or walnuts, and chopped bananas.

Spoon batter evenly into the prepared cake pans.

Bake for 25 to 30 minutes, or until a toothpick inserted into the center comes out clean.

Let the cakes cool in the pans for 10 minutes.

Remove from pans and let cool completely on a wire rack.

Frost with your favorite frosting when completely cooled.