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Commit e45a79da authored by Johannes Berg's avatar Johannes Berg
Browse files

skbuff/mac80211: introduce and use skb_put_zero() 



This pattern was introduced a number of times in mac80211 just now,
and since it's present in a number of other places it makes sense
to add a little helper for it.

This just adds the helper and transforms the mac80211 code, a later
patch will transform other places.

Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 71ec289e

include/linux/skbuff.h

+9 −0
Original line number Diff line number Diff line
@@ -1937,6 +1937,15 @@ static inline unsigned char *__skb_put(struct sk_buff *skb, unsigned int len) 
	return tmp;

}



static inline unsigned char *skb_put_zero(struct sk_buff *skb, unsigned int len)

{

	unsigned char *tmp = skb_put(skb, len);



	memset(tmp, 0, len);



	return tmp;

}



unsigned char *skb_push(struct sk_buff *skb, unsigned int len);

static inline unsigned char *__skb_push(struct sk_buff *skb, unsigned int len)

{

net/mac80211/mesh.c

+3 −6
Original line number Diff line number Diff line
@@ -744,8 +744,7 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) 
		int ie_len = 2 + sizeof(struct ieee80211_channel_sw_ie) +

			     2 + sizeof(struct ieee80211_mesh_chansw_params_ie);



		pos = skb_put(skb, ie_len);

		memset(pos, 0, ie_len);

		pos = skb_put_zero(skb, ie_len);

		*pos++ = WLAN_EID_CHANNEL_SWITCH;

		*pos++ = 3;

		*pos++ = 0x0;
@@ -772,8 +771,7 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) 
		switch (csa->settings.chandef.width) {

		case NL80211_CHAN_WIDTH_40:

			ie_len = 2 + sizeof(struct ieee80211_sec_chan_offs_ie);

			pos = skb_put(skb, ie_len);

			memset(pos, 0, ie_len);

			pos = skb_put_zero(skb, ie_len);



			*pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */

			*pos++ = 1;				    /* len */
@@ -789,8 +787,7 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) 
			/* Channel Switch Wrapper + Wide Bandwidth CSA IE */

			ie_len = 2 + 2 +

				 sizeof(struct ieee80211_wide_bw_chansw_ie);

			pos = skb_put(skb, ie_len);

			memset(pos, 0, ie_len);

			pos = skb_put_zero(skb, ie_len);



			*pos++ = WLAN_EID_CHANNEL_SWITCH_WRAPPER; /* EID */

			*pos++ = 5;				  /* len */

net/mac80211/mesh_plink.c

+1 −2
Original line number Diff line number Diff line
@@ -264,8 +264,7 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata, 
		band = sband->band;



		/* capability info */

		pos = skb_put(skb, 2);

		memset(pos, 0, 2);

		pos = skb_put_zero(skb, 2);

		if (action == WLAN_SP_MESH_PEERING_CONFIRM) {

			/* AID */

			pos = skb_put(skb, 2);