iwlwifi: pcie: fix recovery from ARC reset in WoWLAN

When the ARC is reset when we exit from Sx in case we had
WoWLAN running, we can't access the prph before we reset
the NIC.

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

diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c
index 5c9064f..aea0fe9 100644 (file)
--- a/drivers/net/wireless/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/iwlwifi/pcie/trans.c
@@ -1023,14 +1023,6 @@ static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans,
                return 0;
        }
 
-       iwl_pcie_set_pwr(trans, false);
-
-       val = iwl_read32(trans, CSR_RESET);
-       if (val & CSR_RESET_REG_FLAG_NEVO_RESET) {
-               *status = IWL_D3_STATUS_RESET;
-               return 0;
-       }
-
        /*
         * Also enables interrupts - none will happen as the device doesn't
         * know we're waking it up, only when the opmode actually tells it
@@ -1050,6 +1042,8 @@ static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans,
                return ret;
        }
 
+       iwl_pcie_set_pwr(trans, false);
+
        iwl_trans_pcie_tx_reset(trans);
 
        ret = iwl_pcie_rx_init(trans);
@@ -1058,7 +1052,12 @@ static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans,
                return ret;
        }
 
-       *status = IWL_D3_STATUS_ALIVE;
+       val = iwl_read32(trans, CSR_RESET);
+       if (val & CSR_RESET_REG_FLAG_NEVO_RESET)
+               *status = IWL_D3_STATUS_RESET;
+       else
+               *status = IWL_D3_STATUS_ALIVE;
+
        return 0;
 }