iwlwifi: mvm: BT Coex - always set mandatory fields

The firmware always expects the Coex Mode to be set.
Moreover, the firmware expects bit 0 is the valid bits to
be set all the times.
I misunderstood the API and didn't set these bits when
commands are sent to update the paramters of the Coex. As
a result, the firmware understood that the BT Coex was
disabled (Coex mode = 0) and ignored all the updates (valid
bit 0 clear).

Fix that.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

2 files changed, 11 insertions, 3 deletions

diff --git a/drivers/net/wireless/iwlwifi/mvm/bt-coex.c b/drivers/net/wireless/iwlwifi/mvm/bt-coex.c
index cfff8edefcff..cf29d74370e9 100644
--- a/drivers/net/wireless/iwlwifi/mvm/bt-coex.c
+++ b/drivers/net/wireless/iwlwifi/mvm/bt-coex.c
@@ -471,11 +471,13 @@ static int iwl_mvm_bt_udpate_ctrl_kill_msk(struct iwl_mvm *mvm,
         if (!bt_cmd)
                 return -ENOMEM;
         cmd.data[0] = bt_cmd;
+        bt_cmd->flags = cpu_to_le32(BT_COEX_NW);
 
         bt_cmd->kill_ack_msk = cpu_to_le32(iwl_bt_ack_kill_msk[bt_kill_msk]);
         bt_cmd->kill_cts_msk = cpu_to_le32(iwl_bt_cts_kill_msk[bt_kill_msk]);
-        bt_cmd->valid_bit_msk =
-                cpu_to_le32(BT_VALID_KILL_ACK | BT_VALID_KILL_CTS);
+        bt_cmd->valid_bit_msk |= cpu_to_le32(BT_VALID_ENABLE |
+                                             BT_VALID_KILL_ACK |
+                                             BT_VALID_KILL_CTS);
 
         IWL_DEBUG_COEX(mvm, "ACK Kill msk = 0x%08x, CTS Kill msk = 0x%08x\n",
                        iwl_bt_ack_kill_msk[bt_kill_msk],
@@ -519,8 +521,10 @@ static int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id,
         if (!bt_cmd)
                 return -ENOMEM;
         cmd.data[0] = bt_cmd;
+        bt_cmd->flags = cpu_to_le32(BT_COEX_NW);
 
-        bt_cmd->valid_bit_msk = cpu_to_le32(BT_VALID_REDUCED_TX_POWER),
+        bt_cmd->valid_bit_msk =
+                cpu_to_le32(BT_VALID_ENABLE | BT_VALID_REDUCED_TX_POWER);
         bt_cmd->bt_reduced_tx_power = sta_id;
 
         if (enable)
diff --git a/drivers/net/wireless/iwlwifi/mvm/fw-api-bt-coex.h b/drivers/net/wireless/iwlwifi/mvm/fw-api-bt-coex.h
index acb32f4b3dd4..4ea5e24ca92d 100644
--- a/drivers/net/wireless/iwlwifi/mvm/fw-api-bt-coex.h
+++ b/drivers/net/wireless/iwlwifi/mvm/fw-api-bt-coex.h
@@ -82,6 +82,8 @@
  * @BT_USE_DEFAULTS:
  * @BT_SYNC_2_BT_DISABLE:
  * @BT_COEX_CORUNNING_TBL_EN:
+ *
+ * The COEX_MODE must be set for each command. Even if it is not changed.
  */
 enum iwl_bt_coex_flags {
         BT_CH_PRIMARY_EN                = BIT(0),
@@ -103,6 +105,8 @@ enum iwl_bt_coex_flags {
 
 /*
  * indicates what has changed in the BT_COEX command.
+ * BT_VALID_ENABLE must be set for each command. Commands without this bit will
+ * discarded by the firmware
  */
 enum iwl_bt_coex_valid_bit_msk {
         BT_VALID_ENABLE                 = BIT(0),