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Commit b9a9ada1 authored by Johannes Berg's avatar Johannes Berg
Browse files

mac80211: remove probe response temporary buffer allocation 



Instead of allocating a temporary buffer to build IEs
build them right into the SKB.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent c604b9f2

drivers/net/wireless/mac80211_hwsim.c

+6 −1
Original line number Diff line number Diff line
@@ -1347,9 +1347,14 @@ static void hw_scan_work(struct work_struct *work) 
						       hwsim->hw_scan_vif,

						       req->ssids[i].ssid,

						       req->ssids[i].ssid_len,

						       req->ie, req->ie_len);

						       req->ie_len);

			if (!probe)

				continue;



			if (req->ie_len)

				memcpy(skb_put(probe, req->ie_len), req->ie,

				       req->ie_len);



			local_bh_disable();

			mac80211_hwsim_tx_frame(hwsim->hw, probe,

						hwsim->tmp_chan);

drivers/net/wireless/ti/wl1251/main.c

+3 −1
Original line number Diff line number Diff line
@@ -896,11 +896,13 @@ static int wl1251_op_hw_scan(struct ieee80211_hw *hw, 
		goto out;



	skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,

				     req->ie, req->ie_len);

				     req->ie_len);

	if (!skb) {

		ret = -ENOMEM;

		goto out;

	}

	if (req->ie_len)

		memcpy(skb_put(skb, req->ie_len), req->ie, req->ie_len);



	ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,

				      skb->len);

drivers/net/wireless/ti/wlcore/cmd.c

+3 −1
Original line number Diff line number Diff line
@@ -1038,11 +1038,13 @@ int wl12xx_cmd_build_probe_req(struct wl1271 *wl, struct wl12xx_vif *wlvif, 
	u16 template_id_5 = CMD_TEMPL_CFG_PROBE_REQ_5;



	skb = ieee80211_probereq_get(wl->hw, vif, ssid, ssid_len,

				     ie, ie_len);

				     ie_len);

	if (!skb) {

		ret = -ENOMEM;

		goto out;

	}

	if (ie_len)

		memcpy(skb_put(skb, ie_len), ie, ie_len);



	wl1271_dump(DEBUG_SCAN, "PROBE REQ: ", skb->data, skb->len);

include/net/mac80211.h

+2 −3
Original line number Diff line number Diff line
@@ -3144,8 +3144,7 @@ struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 
 * @vif: &struct ieee80211_vif pointer from the add_interface callback.

 * @ssid: SSID buffer

 * @ssid_len: length of SSID

 * @ie: buffer containing all IEs except SSID for the template

 * @ie_len: length of the IE buffer

 * @tailroom: tailroom to reserve at end of SKB for IEs

 *

 * Creates a Probe Request template which can, for example, be uploaded to

 * hardware.
@@ -3153,7 +3152,7 @@ struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 
struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,

				       struct ieee80211_vif *vif,

				       const u8 *ssid, size_t ssid_len,

				       const u8 *ie, size_t ie_len);

				       size_t tailroom);



/**

 * ieee80211_rts_get - RTS frame generation function

net/mac80211/tx.c

+2 −7
Original line number Diff line number Diff line
@@ -2620,7 +2620,7 @@ EXPORT_SYMBOL(ieee80211_nullfunc_get); 
struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,

				       struct ieee80211_vif *vif,

				       const u8 *ssid, size_t ssid_len,

				       const u8 *ie, size_t ie_len)

				       size_t tailroom)

{

	struct ieee80211_sub_if_data *sdata;

	struct ieee80211_local *local;
@@ -2634,7 +2634,7 @@ struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 
	ie_ssid_len = 2 + ssid_len;



	skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +

			    ie_ssid_len + ie_len);

			    ie_ssid_len + tailroom);

	if (!skb)

		return NULL;
@@ -2655,11 +2655,6 @@ struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 
		memcpy(pos, ssid, ssid_len);

	pos += ssid_len;



	if (ie) {

		pos = skb_put(skb, ie_len);

		memcpy(pos, ie, ie_len);

	}



	return skb;

}

EXPORT_SYMBOL(ieee80211_probereq_get);