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iwlwifi: mvm: don't send GEO_TX_POWER_LIMIT to old firmwares

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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: 66e839030f ("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>
This commit is contained in:
Emmanuel Grumbach 2018-12-14 18:30:22 +02:00 committed by Kalle Valo
parent cddfb283af
commit eca1e56cee
1 changed files with 9 additions and 0 deletions
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9
drivers/net/wireless/intel/iwlwifi/mvm/fw.c
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@ -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,