kernel: ltq-adsl: add patch fixing compilation warning

Add patch fixing compilation warning due to not handled switch
fallthrough, stack limit and compilation warning in g997 module.
Fix compilation warning:
/__w/openwrt/openwrt/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_ase/ltq-dsl-ase/drv_dsl_cpe_api-3.24.4.4/src/pm/drv_dsl_cpe_pm_core.c: In function 'DSL_DRV_PM_CountersReset':
/__w/openwrt/openwrt/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_ase/ltq-dsl-ase/drv_dsl_cpe_api-3.24.4.4/src/pm/drv_dsl_cpe_pm_core.c:2277:7: error: this statement may fall through [-Werror=implicit-fallthrough=]
 2277 |    if (ResetType == DSL_PM_RESET_HISTORY)
      |       ^
/__w/openwrt/openwrt/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_ase/ltq-dsl-ase/drv_dsl_cpe_api-3.24.4.4/src/pm/drv_dsl_cpe_pm_core.c:2280:4: note: here
 2280 |    case DSL_PM_RESET_TOTAL:
      |    ^~~~
/__w/openwrt/openwrt/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_ase/ltq-dsl-ase/drv_dsl_cpe_api-3.24.4.4/src/pm/drv_dsl_cpe_pm_core.c:2284:7: error: this statement may fall through [-Werror=implicit-fallthrough=]
 2284 |    if (ResetType == DSL_PM_RESET_TOTAL)
      |       ^
/__w/openwrt/openwrt/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_ase/ltq-dsl-ase/drv_dsl_cpe_api-3.24.4.4/src/pm/drv_dsl_cpe_pm_core.c:2287:4: note: here
 2287 |    case DSL_PM_RESET_HISTORY_SHOWTIME:
      |    ^~~~
cc1: all warnings being treated as errors

/__w/openwrt/openwrt/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_ase/ltq-dsl-ase/drv_dsl_cpe_api-3.24.4.4/src/device/drv_dsl_cpe_device_danube.c: In function 'DSL_DRV_DEV_AutobootHandleTraining':
/__w/openwrt/openwrt/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_ase/ltq-dsl-ase/drv_dsl_cpe_api-3.24.4.4/src/device/drv_dsl_cpe_device_danube.c:3189:19: error: this statement may fall through [-Werror=implicit-fallthrough=]
 3189 |                if (nErrCode != DSL_SUCCESS)
      |                   ^
/__w/openwrt/openwrt/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_ase/ltq-dsl-ase/drv_dsl_cpe_api-3.24.4.4/src/device/drv_dsl_cpe_device_danube.c:3197:13: note: here
 3197 |             case DSL_LINESTATE_IDLE:
      |             ^~~~
cc1: all warnings being treated as errors

/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_ase/ltq-dsl-ase/drv_dsl_cpe_api-3.24.4.4/src/g997/drv_dsl_cpe_api_g997_danube.c: In function 'DSL_DRV_DEV_G997_PowerManagementStateForcedTrigger':
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_ase/ltq-dsl-ase/drv_dsl_cpe_api-3.24.4.4/src/g997/drv_dsl_cpe_api_g997_danube.c:2532:52: error: bitwise comparison always evaluates to false [-Werror=tautological-compare]
 2532 |                      else if (((nVal >> 4) & 0x15) == 0x9)
      |                                                    ^~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_ase/ltq-dsl-ase/drv_dsl_cpe_api-3.24.4.4/src/g997/drv_dsl_cpe_api_g997_danube.c: In function 'DSL_DRV_DEV_G997_DeltHlogGet':
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_ase/ltq-dsl-ase/drv_dsl_cpe_api-3.24.4.4/src/g997/drv_dsl_cpe_api_g997_danube.c:2108:1: error: the frame size of 1056 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
 2108 | }
      | ^
cc1: all warnings being treated as errors

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/package/kernel/lantiq/ltq-adsl/patches/203-g997_danube-fix-compilation-warning.patch b/package/kernel/lantiq/ltq-adsl/patches/203-g997_danube-fix-compilation-warning.patch
new file mode 100644
index 0000000000..c6a0e70f1f
--- /dev/null
+++ b/package/kernel/lantiq/ltq-adsl/patches/203-g997_danube-fix-compilation-warning.patch
@@ -0,0 +1,26 @@
+--- a/src/g997/drv_dsl_cpe_api_g997_danube.c
++++ b/src/g997/drv_dsl_cpe_api_g997_danube.c
+@@ -2512,6 +2524,7 @@ DSL_Error_t DSL_DRV_DEV_G997_PowerManagementStateForcedTrigger(
+                   else
+                   {
+                      /* read L3 request failure reason */
++                     DSL_uint8_t nErrCodeL3;
+                      nErrCode = DSL_DRV_DANUBE_CmvRead(pContext, DSL_CMV_GROUP_STAT,
+                         DSL_CMV_ADDRESS_STAT_L3_FAILURE_REASON, 0, 1, &nVal);
+                      DSL_DEBUG(DSL_DBG_MSG,
+@@ -2525,11 +2538,13 @@ DSL_Error_t DSL_DRV_DEV_G997_PowerManagementStateForcedTrigger(
+                         nErrCode = DSL_ERR_MSG_EXCHANGE;
+                         break;
+                      }
+-                     if (((nVal >> 4) & 0x15) == 0x5)
++
++                     nErrCodeL3 = (nVal >> 4) & 0x15;
++                     if (nErrCodeL3 == 0x5)
+                      {
+                         nErrCode = DSL_ERR_L3_NOT_IN_L0;
+                      }
+-                     else if (((nVal >> 4) & 0x15) == 0x9)
++                     else if (nErrCodeL3 == 0x9)
+                      {
+                         nErrCode = DSL_ERR_L3_TIMED_OUT;
+                      }