From: Bing Zhao <bzhao@marvell.com>
Date: Thu, 31 Jan 2013 03:56:01 +0000 (-0800)
Subject: mwifiex: do not reconfigure tx buffer size in firmware while associating
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=62749238d1af581d01169f59ebbde4811c3c3143;p=linux-beck.git

mwifiex: do not reconfigure tx buffer size in firmware while associating

It's observed that reconfiguration of tx buffer size before
association can cause data path failure in firmware after
associated. Although this is only found with PCIe cards, but
potentially it could happen with any other interfaces as well.

The tx buffer reconfiguration is not really useful in firmware.
Let's remove it for all interfaces.

Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/mwifiex/11n.c b/drivers/net/wireless/mwifiex/11n.c
index 9cd6216c61e6..48cc46bc152f 100644
--- a/drivers/net/wireless/mwifiex/11n.c
+++ b/drivers/net/wireless/mwifiex/11n.c
@@ -399,45 +399,6 @@ mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
 	return ret_len;
 }
 
-/*
- * This function reconfigures the Tx buffer size in firmware.
- *
- * This function prepares a firmware command and issues it, if
- * the current Tx buffer size is different from the one requested.
- * Maximum configurable Tx buffer size is limited by the HT capability
- * field value.
- */
-void
-mwifiex_cfg_tx_buf(struct mwifiex_private *priv,
-		   struct mwifiex_bssdescriptor *bss_desc)
-{
-	u16 max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_2K;
-	u16 tx_buf, curr_tx_buf_size = 0;
-
-	if (bss_desc->bcn_ht_cap) {
-		if (le16_to_cpu(bss_desc->bcn_ht_cap->cap_info) &
-				IEEE80211_HT_CAP_MAX_AMSDU)
-			max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_8K;
-		else
-			max_amsdu = MWIFIEX_TX_DATA_BUF_SIZE_4K;
-	}
-
-	tx_buf = min(priv->adapter->max_tx_buf_size, max_amsdu);
-
-	dev_dbg(priv->adapter->dev, "info: max_amsdu=%d, max_tx_buf=%d\n",
-		max_amsdu, priv->adapter->max_tx_buf_size);
-
-	if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_2K)
-		curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
-	else if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_4K)
-		curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K;
-	else if (priv->adapter->curr_tx_buf_size <= MWIFIEX_TX_DATA_BUF_SIZE_8K)
-		curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_8K;
-	if (curr_tx_buf_size != tx_buf)
-		mwifiex_send_cmd_async(priv, HostCmd_CMD_RECONFIGURE_TX_BUFF,
-				       HostCmd_ACT_GEN_SET, 0, &tx_buf);
-}
-
 /*
  * This function checks if the given pointer is valid entry of
  * Tx BA Stream table.
diff --git a/drivers/net/wireless/mwifiex/11n.h b/drivers/net/wireless/mwifiex/11n.h
index 46006a54a656..29a4c02479d6 100644
--- a/drivers/net/wireless/mwifiex/11n.h
+++ b/drivers/net/wireless/mwifiex/11n.h
@@ -34,8 +34,6 @@ int mwifiex_cmd_11n_cfg(struct host_cmd_ds_command *cmd, u16 cmd_action,
 int mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
 			       struct mwifiex_bssdescriptor *bss_desc,
 			       u8 **buffer);
-void mwifiex_cfg_tx_buf(struct mwifiex_private *priv,
-			struct mwifiex_bssdescriptor *bss_desc);
 void mwifiex_fill_cap_info(struct mwifiex_private *, u8 radio_type,
 			   struct mwifiex_ie_types_htcap *);
 int mwifiex_set_get_11n_htcap_cfg(struct mwifiex_private *priv,
diff --git a/drivers/net/wireless/mwifiex/join.c b/drivers/net/wireless/mwifiex/join.c
index f0a634d237c1..a537297866c6 100644
--- a/drivers/net/wireless/mwifiex/join.c
+++ b/drivers/net/wireless/mwifiex/join.c
@@ -398,8 +398,6 @@ int mwifiex_cmd_802_11_associate(struct mwifiex_private *priv,
 
 	pos = (u8 *) assoc;
 
-	mwifiex_cfg_tx_buf(priv, bss_desc);
-
 	cmd->command = cpu_to_le16(HostCmd_CMD_802_11_ASSOCIATE);
 
 	/* Save so we know which BSS Desc to use in the response handler */