In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warning:

drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c: In function 
‘gfx_v8_0_tiling_mode_table_init’:
./include/linux/device.h:1487:2: warning: this statement may fall through 
[-Wimplicit-fallthrough=]
  _dev_warn(dev, dev_fmt(fmt), ##__VA_ARGS__)
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c:3236:3: note: in expansion of macro 
‘dev_warn’
   dev_warn(adev->dev,
   ^~~~~~~~
drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c:3240:2: note: here
  case CHIP_CARRIZO:
  ^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gust...@embeddedor.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c 
b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index b8e50a34bdb3..02955e6e9dd9 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -3236,6 +3236,7 @@ static void gfx_v8_0_tiling_mode_table_init(struct 
amdgpu_device *adev)
                dev_warn(adev->dev,
                         "Unknown chip type (%d) in function 
gfx_v8_0_tiling_mode_table_init() falling through to CHIP_CARRIZO\n",
                         adev->asic_type);
+               /* fall through */
 
        case CHIP_CARRIZO:
                modearray[0] = (ARRAY_MODE(ARRAY_2D_TILED_THIN1) |
-- 
2.21.0

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