There is an incorrect fallthrough identified by PVS studio.
Even though this is in base code it should be fixed, and
the warning should be re-enabled to prevent future bugs.

Link: https://pvs-studio.com/en/blog/posts/cpp/1183/

Fixes: f2553cb9eba6 ("net/e1000/base: add new I219 devices")
Cc: qiming.y...@intel.com

Signed-off-by: Stephen Hemminger <step...@networkplumber.org>
Acked-by: Bruce Richardson <bruce.richard...@intel.com>
---
 drivers/net/e1000/base/e1000_82575.c | 2 +-
 drivers/net/e1000/base/e1000_api.c   | 2 +-
 drivers/net/e1000/base/meson.build   | 1 -
 3 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/e1000/base/e1000_82575.c 
b/drivers/net/e1000/base/e1000_82575.c
index 7c78649393..ccc7aeab21 100644
--- a/drivers/net/e1000/base/e1000_82575.c
+++ b/drivers/net/e1000/base/e1000_82575.c
@@ -1722,6 +1722,7 @@ STATIC s32 e1000_get_media_type_82575(struct e1000_hw *hw)
                        break;
                }
                /* Fall through for I2C based SGMII */
+               /* Fall through */
        case E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES:
                /* read media type from SFP EEPROM */
                ret_val = e1000_set_sfp_media_type_82575(hw);
@@ -3585,4 +3586,3 @@ void e1000_i2c_bus_clear(struct e1000_hw *hw)
        /* Put the i2c bus back to default state */
        e1000_i2c_stop(hw);
 }
-
diff --git a/drivers/net/e1000/base/e1000_api.c 
b/drivers/net/e1000/base/e1000_api.c
index 0f6e5afa3b..61b3ead469 100644
--- a/drivers/net/e1000/base/e1000_api.c
+++ b/drivers/net/e1000/base/e1000_api.c
@@ -295,6 +295,7 @@ s32 e1000_set_mac_type(struct e1000_hw *hw)
        case E1000_DEV_ID_PCH_RPL_I219_LM23:
        case E1000_DEV_ID_PCH_RPL_I219_V23:
                mac->type = e1000_pch_tgp;
+               break;
        case E1000_DEV_ID_PCH_ADL_I219_LM17:
        case E1000_DEV_ID_PCH_ADL_I219_V17:
        case E1000_DEV_ID_PCH_RPL_I219_LM22:
@@ -1368,4 +1369,3 @@ void e1000_shutdown_fiber_serdes_link(struct e1000_hw *hw)
        if (hw->mac.ops.shutdown_serdes)
                hw->mac.ops.shutdown_serdes(hw);
 }
-
diff --git a/drivers/net/e1000/base/meson.build 
b/drivers/net/e1000/base/meson.build
index 6d6048488f..e73f3d6d55 100644
--- a/drivers/net/e1000/base/meson.build
+++ b/drivers/net/e1000/base/meson.build
@@ -24,7 +24,6 @@ sources = [
 
 error_cflags = [
         '-Wno-unused-parameter',
-        '-Wno-implicit-fallthrough',
 ]
 c_args = cflags
 foreach flag: error_cflags
-- 
2.45.2

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