[PATCH 3/7] staging:r8188eu: inline unprotect_frame() in mon_recv_decrypted_recv()

[Ivan Safonov]

It is useful to remove IV/ICV from rtl88eu_mon_recv_hook().
Also unprotect_frame() will be very short without skb_(pull|trim).

Signed-off-by: Ivan Safonov <insafo...@gmail.com>
---
 drivers/staging/rtl8188eu/os_dep/mon.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/rtl8188eu/os_dep/mon.c 
b/drivers/staging/rtl8188eu/os_dep/mon.c
index 7eac87d..53f853f 100644
--- a/drivers/staging/rtl8188eu/os_dep/mon.c
+++ b/drivers/staging/rtl8188eu/os_dep/mon.c
@@ -70,6 +70,8 @@ static void mon_recv_decrypted_recv(struct net_device *dev, 
const u8 *data,
                               int data_len, int iv_len, int icv_len)
 {
        struct sk_buff *skb;
+       struct ieee80211_hdr *hdr;
+       int hdr_len;
 
        skb = netdev_alloc_skb(dev, data_len);
        if (!skb)
@@ -80,7 +82,19 @@ static void mon_recv_decrypted_recv(struct net_device *dev, 
const u8 *data,
         * Frame data is not encrypted. Strip off protection so
         * userspace doesn't think that it is.
         */
-       unprotect_frame(skb, iv_len, icv_len);
+
+       hdr = (struct ieee80211_hdr *)skb->data;
+       hdr_len = ieee80211_hdrlen(hdr->frame_control);
+
+       if (skb->len < hdr_len + iv_len + icv_len) {
+               if (ieee80211_has_protected(hdr->frame_control)) {
+                       hdr->frame_control &= 
~cpu_to_le16(IEEE80211_FCTL_PROTECTED);
+
+                       memmove(skb->data + iv_len, skb->data, hdr_len);
+                       skb_pull(skb, iv_len);
+                       skb_trim(skb, skb->len - icv_len);
+               }
+       }
 
        skb->ip_summed = CHECKSUM_UNNECESSARY;
        skb->protocol = eth_type_trans(skb, dev);
-- 
2.10.2