iwlwifi: mvm: add a flag to disable checksum

Add a constant to allow disabling checksum. This will enable easier
debugging in early phases.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/constants.h

@@ -109,6 +109,7 @@
 #define IWL_MVM_RS_80_20_FAR_RANGE_TWEAK	1
 #define IWL_MVM_TOF_IS_RESPONDER		0
 #define IWL_MVM_SW_TX_CSUM_OFFLOAD		0
+#define IWL_MVM_HW_CSUM_DISABLE			0
 #define IWL_MVM_COLLECT_FW_ERR_DUMP		1
 #define IWL_MVM_RS_NUM_TRY_BEFORE_ANT_TOGGLE    1
 #define IWL_MVM_RS_HT_VHT_RETRIES_PER_RATE      2

drivers/net/wireless/intel/iwlwifi/mvm/mvm.h

@@ -1127,7 +1127,8 @@ static inline bool iwl_mvm_bt_is_rrc_supported(struct iwl_mvm *mvm)
 static inline bool iwl_mvm_is_csum_supported(struct iwl_mvm *mvm)
 {
 	return fw_has_capa(&mvm->fw->ucode_capa,
-			   IWL_UCODE_TLV_CAPA_CSUM_SUPPORT);
+			   IWL_UCODE_TLV_CAPA_CSUM_SUPPORT) &&
+               !IWL_MVM_HW_CSUM_DISABLE;
 }
 
 static inline bool iwl_mvm_is_mplut_supported(struct iwl_mvm *mvm)