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drm/dp: annotate implicit fall throughs 

There is a plan to build the kernel with -Wimplicit-fallthrough and
these places in the code produced warnings (W=1). Fix them up.

This commit remove the following warnings:

  include/linux/compiler.h:77:22: warning: this statement may fall through [-Wimplicit-fallthrough=]
  include/asm-generic/bug.h:134:2: note: in expansion of macro 'unlikely'
  drivers/gpu/drm/drm_dp_helper.c:155:3: note: in expansion of macro 'WARN'
  include/linux/compiler.h:77:22: warning: this statement may fall through [-Wimplicit-fallthrough=]
  include/asm-generic/bug.h:134:2: note: in expansion of macro 'unlikely'
  drivers/gpu/drm/drm_dp_helper.c:173:3: note: in expansion of macro 'WARN'
  drivers/gpu/drm/drm_dp_helper.c:547:3: warning: this statement may fall through [-Wimplicit-fallthrough=]

Signed-off-by: Mathieu Malaterre <malat@debian.org>
Acked-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190114202748.15584-1-malat@debian.org
This commit is contained in:
Mathieu Malaterre 2019-01-14 21:27:47 +01:00 committed by Daniel Vetter
parent 2db8ebca1f
commit e9c0c87471
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/drm_dp_helper.c
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@ -154,6 +154,7 @@ u8 drm_dp_link_rate_to_bw_code(int link_rate)
default:
WARN(1, "unknown DP link rate %d, using %x\n", link_rate,
DP_LINK_BW_1_62);
/* fall through */
case 162000:
return DP_LINK_BW_1_62;
case 270000:
@ -171,6 +172,7 @@ int drm_dp_bw_code_to_link_rate(u8 link_bw)
switch (link_bw) {
default:
WARN(1, "unknown DP link BW code %x, using 162000\n", link_bw);
/* fall through */
case DP_LINK_BW_1_62:
return 162000;
case DP_LINK_BW_2_7:
@ -552,6 +554,7 @@ int drm_dp_downstream_max_bpc(const u8 dpcd[DP_RECEIVER_CAP_SIZE],
case DP_DS_16BPC:
return 16;
}
/* fall through */
default:
return 0;
}