diff options
| author | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2018-12-14 18:30:22 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-29 13:37:58 +0100 |
| commit | c151740ff107ddd253447ff4d0825c438a8692f9 (patch) | |
| tree | 58fe0013109d96896bc1ded8a3b2b63521c35064 | |
| parent | fed44d6cb15f5e9dea806ae555dbe3b06a6c312d (diff) | |
iwlwifi: mvm: don't send GEO_TX_POWER_LIMIT to old firmwares
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>
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/fw.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c index 4d49a1a3f504..16c6c7f921a8 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c @@ -868,6 +868,15 @@ 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, |