drivers: staging: vme: Fixed checking NULL and 0 code style

Signed-off-by: Egor Uleyskiy <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/vme/devices/vme_pio2_core.c

···
 	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;

drivers/staging/vme/devices/vme_pio2_gpio.c

···
 
 	label = kasprintf(GFP_KERNEL,
 			  "%s@%s", driver_name, dev_name(&card->vdev->dev));
-	if (label == NULL)
+	if (!label)
 		return -ENOMEM;
 
 	card->gc.label = label;

drivers/staging/vme/devices/vme_user.c

···
 		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;