case MUSB_EP0_STAGE_ACKWAIT: /* STALL for zero-length data */
case MUSB_EP0_STAGE_RX: /* control-OUT data */
csr = musb_readw(regs, MUSB_CSR0);
- /* FALLTHROUGH */
+ fallthrough;
/* It's also OK to issue stalls during callbacks when a non-empty
* DATA stage buffer has been read (or even written).