Re: [PATCH spice] Add "fall through" comments where necessary

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On Thu, 2017-02-09 at 06:09 -0500, Frediano Ziglio wrote:
> > 
> > Make gcc 7.0.1 happy
> > ---
> > I am unable to compile using defaults on Fedora 26
> 
> Looking at https://gcc.gnu.org/ looks like 7.0 is in development.
> I would prefer you disable the warnings and wait for a final
> release.
> 
ok, I can of course add --disable-werror


> OT (nothing personal):
> Maybe we are enabling too much warning? Is not possible that
> every week somebody came with patches fixing warnings of this
> or that compiler version.

Apparently these are coming from our configure.ac:

AM_INIT_AUTOMAKE([1.11 dist-xz no-dist-gzip tar-ustar foreign -Wall
-Werror])

gcc is adding more stuff to -Wall and since we have -Werror it is
making it failing

In general I think it is good to fix warnings - nothing personal as
well :)

Pavel

> 
> > ---
> >  server/dcc.c            | 3 ++-
> >  server/inputs-channel.c | 2 +-
> >  server/reds.c           | 2 ++
> >  3 files changed, 5 insertions(+), 2 deletions(-)
> > 
> > diff --git a/server/dcc.c b/server/dcc.c
> > index afe37b1a..7c3d3765 100644
> > --- a/server/dcc.c
> > +++ b/server/dcc.c
> > @@ -885,8 +885,9 @@ int dcc_compress_image(DisplayChannelClient
> > *dcc,
> >              break;
> >          }
> >  #endif
> > -lz_compress:
> > +        /* fall through */
> >      case SPICE_IMAGE_COMPRESSION_LZ:
> > +lz_compress:
> >          success = image_encoders_compress_lz(&dcc->priv-
> > >encoders, dest,
> >          src, o_comp_data);
> >          if (success && !bitmap_fmt_is_rgb(src->format)) {
> >              dcc_palette_cache_palette(dcc, dest-
> > >u.lz_plt.palette,
> >              &(dest->u.lz_plt.flags));
> > diff --git a/server/inputs-channel.c b/server/inputs-channel.c
> > index f105b4d0..0fb4d949 100644
> > --- a/server/inputs-channel.c
> > +++ b/server/inputs-channel.c
> > @@ -295,8 +295,8 @@ static int
> > inputs_channel_handle_parsed(RedChannelClient
> > *rcc, uint32_t size, ui
> >              key_down->code == SCROLL_LOCK_SCAN_CODE) {
> >              activate_modifiers_watch(inputs_channel, reds);
> >          }
> > -        /* fallthrough */
> >      }
> > +        /* fallthrough */
> >      case SPICE_MSGC_INPUTS_KEY_UP: {
> >          SpiceMsgcKeyUp *key_up = message;
> >          for (i = 0; i < 4; i++) {
> > diff --git a/server/reds.c b/server/reds.c
> > index 953a95a4..bd24741b 100644
> > --- a/server/reds.c
> > +++ b/server/reds.c
> > @@ -766,6 +766,7 @@ static RedPipeItem
> > *vdi_port_read_one_msg_from_device(RedCharDevice *self,
> >              }
> >              dev->priv->message_receive_len =
> >              dev->priv->vdi_chunk_header.size;
> >              dev->priv->read_state = VDI_PORT_READ_STATE_GET_BUFF;
> > +            /* fall through */
> >          case VDI_PORT_READ_STATE_GET_BUFF: {
> >              if (!(dev->priv->current_read_buf =
> >              vdi_port_get_read_buf(reds->agent_dev))) {
> >                  return NULL;
> > @@ -777,6 +778,7 @@ static RedPipeItem
> > *vdi_port_read_one_msg_from_device(RedCharDevice *self,
> >              dev->priv->message_receive_len -= dev->priv-
> > >receive_len;
> >              dev->priv->read_state =
> > VDI_PORT_READ_STATE_READ_DATA;
> >          }
> > +            /* fall through */
> >          case VDI_PORT_READ_STATE_READ_DATA: {
> >              n = sif->read(reds->vdagent, dev->priv->receive_pos,
> >              dev->priv->receive_len);
> >              if (!n) {
> 
> Frediano
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