GCC9 is confused by this comment when building with CFLAG -Wimplicit-fallthrough=2:
hw/net/imx_fec.c: In function ‘imx_eth_write’: hw/net/imx_fec.c:906:12: error: this statement may fall through [-Werror=implicit-fallthrough=] 906 | if (unlikely(single_tx_ring)) { | ^ hw/net/imx_fec.c:912:5: note: here 912 | case ENET_TDAR: /* FALLTHROUGH */ | ^~~~ cc1: all warnings being treated as errors Rewrite the comments in the correct place, using 'fall through' which is recognized by GCC and static analyzers. Reviewed-by: Richard Henderson <richard.hender...@linaro.org> Reviewed-by: Aleksandar Markovic <amarko...@wavecomp.com> Signed-off-by: Philippe Mathieu-Daudé <phi...@redhat.com> --- Cc: Peter Chubb <peter.ch...@nicta.com.au> Cc: Peter Maydell <peter.mayd...@linaro.org> Cc: Jason Wang <jasow...@redhat.com> Cc: qemu-...@nongnu.org --- hw/net/imx_fec.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/hw/net/imx_fec.c b/hw/net/imx_fec.c index bd99236864..c01ce4f078 100644 --- a/hw/net/imx_fec.c +++ b/hw/net/imx_fec.c @@ -909,7 +909,8 @@ static void imx_eth_write(void *opaque, hwaddr offset, uint64_t value, TYPE_IMX_FEC, __func__); return; } - case ENET_TDAR: /* FALLTHROUGH */ + /* fall through */ + case ENET_TDAR: if (s->regs[ENET_ECR] & ENET_ECR_ETHEREN) { s->regs[index] = ENET_TDAR_TDAR; imx_eth_do_tx(s, index); -- 2.21.0