iwlwifi: pcie: fix (again) prepare card flow

The hardware bug in the commit mentioned below forces us
not to re-enable the clock gating in the Host Cluster.
The impact on the power consumption is minimal and it allows
the WAKE_ME interrupt to propagate.

CC: <stable@vger.kernel.org> [4.1+]
Fixes: c9fdec9f3970 ("iwlwifi: pcie: fix prepare card flow")
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 6ba7d30..9028345 100644 (file)
--- a/drivers/net/wireless/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/iwlwifi/pcie/trans.c
@@ -592,10 +592,8 @@ static int iwl_pcie_prepare_card_hw(struct iwl_trans *trans)
 
                do {
                        ret = iwl_pcie_set_hw_ready(trans);
-                       if (ret >= 0) {
-                               ret = 0;
-                               goto out;
-                       }
+                       if (ret >= 0)
+                               return 0;
 
                        usleep_range(200, 1000);
                        t += 200;
@@ -605,10 +603,6 @@ static int iwl_pcie_prepare_card_hw(struct iwl_trans *trans)
 
        IWL_ERR(trans, "Couldn't prepare the card\n");
 
-out:
-       iwl_clear_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
-                     CSR_RESET_LINK_PWR_MGMT_DISABLED);
-
        return ret;
 }