card->vdev = vdev;
 
        for (i = 0; i < PIO2_VARIANT_LENGTH; i++) {
-               if (isdigit(card->variant[i]) == 0) {
+               if (!isdigit(card->variant[i])) {
                        dev_err(&card->vdev->dev, "Variant invalid\n");
                        retval = -EINVAL;
                        goto err_variant;
 
                case VME_IRQ_GEN:
                        copied = copy_from_user(&irq_req, argp,
                                                sizeof(irq_req));
-                       if (copied != 0) {
+                       if (copied) {
                                pr_warn("Partial copy from userspace\n");
                                return -EFAULT;
                        }
 
                        copied = copy_to_user(argp, &master,
                                              sizeof(master));
-                       if (copied != 0) {
+                       if (copied) {
                                pr_warn("Partial copy to userspace\n");
                                return -EFAULT;
                        }
                        }
 
                        copied = copy_from_user(&master, argp, sizeof(master));
-                       if (copied != 0) {
+                       if (copied) {
                                pr_warn("Partial copy from userspace\n");
                                return -EFAULT;
                        }
 
                        copied = copy_to_user(argp, &slave,
                                              sizeof(slave));
-                       if (copied != 0) {
+                       if (copied) {
                                pr_warn("Partial copy to userspace\n");
                                return -EFAULT;
                        }
                case VME_SET_SLAVE:
 
                        copied = copy_from_user(&slave, argp, sizeof(slave));
-                       if (copied != 0) {
+                       if (copied) {
                                pr_warn("Partial copy from userspace\n");
                                return -EFAULT;
                        }
         * we just change the code in vme_user_match().
         */
        retval = vme_register_driver(&vme_user_driver, VME_MAX_SLOTS);
-       if (retval != 0)
+       if (retval)
                goto err_reg;
 
        return retval;