iwlwifi: disable early power Off reset for all NICs

This feature needs to be disabled for all NICs.

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

1 files changed, 12 insertions, 1 deletions

diff --git a/drivers/net/wireless/iwlwifi/dvm/main.c b/drivers/net/wireless/iwlwifi/dvm/main.c
index bba3edfb348..c642c217e29 100644
--- a/drivers/net/wireless/iwlwifi/dvm/main.c
+++ b/drivers/net/wireless/iwlwifi/dvm/main.c
@@ -51,11 +51,13 @@
 #include "iwl-op-mode.h"
 #include "iwl-drv.h"
 #include "iwl-modparams.h"
+#include "iwl-prph.h"
 
 #include "dev.h"
 #include "calib.h"
 #include "agn.h"
 
+
 /******************************************************************************
  *
  * module boiler plate
@@ -2076,7 +2078,16 @@ static void iwl_nic_config(struct iwl_op_mode *op_mode)
                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
 
-        priv->lib->nic_config(priv);
+        /* W/A : NIC is stuck in a reset state after Early PCIe power off
+         * (PCIe power is lost before PERST# is asserted),
+         * causing ME FW to lose ownership and not being able to obtain it back.
+         */
+        iwl_set_bits_mask_prph(priv->trans, APMG_PS_CTRL_REG,
+                               APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
+                               ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
+
+        if (priv->lib->nic_config)
+                priv->lib->nic_config(priv);
 }
 
 static void iwl_wimax_active(struct iwl_op_mode *op_mode)