4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Emmanuel Grumbach emmanuel.grumbach@intel.com
commit eca1e56ceedd9cc185eb18baf307d3ff2e4af376 upstream.
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: stable@vger.kernel.org #4.19+ Signed-off-by: Emmanuel Grumbach emmanuel.grumbach@intel.com Signed-off-by: Luca Coelho luciano.coelho@intel.com Signed-off-by: Kalle Valo kvalo@codeaurora.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/net/wireless/intel/iwlwifi/mvm/fw.c | 9 +++++++++ 1 file changed, 9 insertions(+)
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c @@ -952,6 +952,15 @@ static int iwl_mvm_sar_geo_init(struct i 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,