In preparation to enable -Wimplicit-fallthrough for Clang, fix a couple
of warnings by explicitly adding a break statement instead of letting
the code fall through to the next case, and a fallthrough pseudo-keyword
as a replacement for a /* fall through */ comment,

Notice that Clang doesn't recognize /* fall through */ comments as
implicit fall-through markings.

Link: https://github.com/KSPP/linux/issues/115
Signed-off-by: Gustavo A. R. Silva <gustavo...@kernel.org>
---
 drivers/gpu/drm/amd/pm/powerplay/si_dpm.c                  | 2 +-
 drivers/gpu/drm/amd/pm/powerplay/smumgr/polaris10_smumgr.c | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/pm/powerplay/si_dpm.c 
b/drivers/gpu/drm/amd/pm/powerplay/si_dpm.c
index b5986d19dc08..afa1711c9620 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/si_dpm.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/si_dpm.c
@@ -6200,8 +6200,8 @@ static void 
si_request_link_speed_change_before_state_change(struct amdgpu_devic
                case AMDGPU_PCIE_GEN2:
                        if (amdgpu_acpi_pcie_performance_request(adev, 
PCIE_PERF_REQ_PECI_GEN2, false) == 0)
                                break;
+                       fallthrough;
 #endif
-                       /* fall through */
                default:
                        si_pi->force_pcie_gen = si_get_current_pcie_speed(adev);
                        break;
diff --git a/drivers/gpu/drm/amd/pm/powerplay/smumgr/polaris10_smumgr.c 
b/drivers/gpu/drm/amd/pm/powerplay/smumgr/polaris10_smumgr.c
index c3d2e6dcf62a..7d7d698c7976 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/smumgr/polaris10_smumgr.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/smumgr/polaris10_smumgr.c
@@ -2272,6 +2272,7 @@ static int polaris10_update_smc_table(struct pp_hwmgr 
*hwmgr, uint32_t type)
                break;
        case SMU_BIF_TABLE:
                polaris10_update_bif_smc_table(hwmgr);
+               break;
        default:
                break;
        }
-- 
2.27.0

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