iwlwifi: avoid sending too many commands

When the PAN context is unused, there's no
need to continually update it in the device.
So track which contexts are active (with the
special case that the WLAN context is always
active ...) and only send their commands to
the device when needed.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index df2edccdf9bd..a19671d99248 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -110,6 +110,9 @@ int iwl_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
         if (!iwl_is_alive(priv))
                 return -EBUSY;
 
+        if (!ctx->is_active)
+                return 0;
+
         /* always get timestamp with Rx frame */
         ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
 
@@ -4301,6 +4304,8 @@ static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
                 priv->contexts[i].ctxid = i;
 
+        priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
+        priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;