From f5a47fae6aa3eb06f100e701d2342ee56b857bee Mon Sep 17 00:00:00 2001
From: Luca Coelho <luciano.coelho@intel.com>
Date: Fri, 19 Jul 2019 12:21:59 +0300
Subject: [PATCH] iwlwifi: mvm: fix version check for GEO_TX_POWER_LIMIT
 support
Git-commit: f5a47fae6aa3eb06f100e701d2342ee56b857bee
Patch-mainline: v5.3
References: bsc#1142635

We erroneously added a check for FW API version 41 before sending
GEO_TX_POWER_LIMIT, but this was already implemented in version 38.
Additionally, it was cherry-picked to older versions, namely 17, 26
and 29, so check for those as well.

Cc: stable@vger.kernel.org
Fixes: eca1e56ceedd ("iwlwifi: mvm: don't send GEO_TX_POWER_LIMIT to old firmwares")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/fw.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
index a837cf40afde..00c89bcfdf6a 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw.c
@@ -886,9 +886,14 @@ static bool iwl_mvm_sar_geo_support(struct iwl_mvm *mvm)
 	 * The GEO_TX_POWER_LIMIT 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.
+	 * the first byte of ucode_ver.  This was implemented
+	 * initially on version 38 and then backported to 36, 29 and
+	 * 17.
 	 */
-	return IWL_UCODE_SERIAL(mvm->fw->ucode_ver) >= 41;
+	return IWL_UCODE_SERIAL(mvm->fw->ucode_ver) >= 38 ||
+	       IWL_UCODE_SERIAL(mvm->fw->ucode_ver) == 36 ||
+	       IWL_UCODE_SERIAL(mvm->fw->ucode_ver) == 29 ||
+	       IWL_UCODE_SERIAL(mvm->fw->ucode_ver) == 17;
 }
 
 int iwl_mvm_get_sar_geo_profile(struct iwl_mvm *mvm)
-- 
2.16.4