From: Emmanuel Grumbach <emmanuel.grumb...@intel.com> Old firmware versions don't support this command. Sending it to any firmware before -41.ucode will crash the firmware.
This fixes https://bugzilla.kernel.org/show_bug.cgi?id=201975 Fixes: 66e839030fd6 ("iwlwifi: fix wrong WGDS_WIFI_DATA_SIZE") CC: <sta...@vger.kernel.org> #4.19+ Signed-off-by: Emmanuel Grumbach <emmanuel.grumb...@intel.com> Signed-off-by: Luca Coelho <luciano.coe...@intel.com> --- drivers/net/wireless/intel/iwlwifi/mvm/fw.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c index 2ba890445c35..1689bead1b4f 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c @@ -881,6 +881,15 @@ static int iwl_mvm_sar_geo_init(struct iwl_mvm *mvm) int ret, i, j; u16 cmd_wide_id = WIDE_ID(PHY_OPS_GROUP, GEO_TX_POWER_LIMIT); + /* + * This command is not supported on earlier firmware versions. + * Unfortunately, we don't have a TLV API flag to rely on, so + * rely on the major version which is in the first byte of + * ucode_ver. + */ + if (IWL_UCODE_SERIAL(mvm->fw->ucode_ver) < 41) + return 0; + ret = iwl_mvm_sar_get_wgds_table(mvm); if (ret < 0) { IWL_DEBUG_RADIO(mvm, -- 2.19.2
