wext: Emit event stream entries correctly when compat.

Three major portions to this change:

1) Add IW_EV_COMPAT_LCP_LEN, IW_EV_COMPAT_POINT_OFF,
   and IW_EV_COMPAT_POINT_LEN helper defines.

2) Delete iw_stream_check_add_*(), they are unused.

3) Add iw_request_info argument to iwe_stream_add_*(), and use it to
   size the event and pointer lengths correctly depending upon whether
   IW_REQUEST_FLAG_COMPAT is set or not.

4) The mechanical transformations to the drivers and wireless stack
   bits to get the iw_request_info passed down into the routines
   modified in #3.  Also, explicit references to IW_EV_LCP_LEN are
   replaced with iwe_stream_lcp_len(info).

With a lot of help and bug fixes from Masakazu Mokuno.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 13 insertions, 8 deletions

diff --git a/drivers/net/wireless/zd1201.c b/drivers/net/wireless/zd1201.c
index d5c0c66188ca..07e4d1f73207 100644
--- a/drivers/net/wireless/zd1201.c
+++ b/drivers/net/wireless/zd1201.c
@@ -1152,32 +1152,36 @@ static int zd1201_get_scan(struct net_device *dev,
                 iwe.cmd = SIOCGIWAP;
                 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
                 memcpy(iwe.u.ap_addr.sa_data, zd->rxdata+i+6, 6);
-                cev = iwe_stream_add_event(cev, end_buf, &iwe, IW_EV_ADDR_LEN);
+                cev = iwe_stream_add_event(info, cev, end_buf,
+                                           &iwe, IW_EV_ADDR_LEN);
 
                 iwe.cmd = SIOCGIWESSID;
                 iwe.u.data.length = zd->rxdata[i+16];
                 iwe.u.data.flags = 1;
-                cev = iwe_stream_add_point(cev, end_buf, &iwe, zd->rxdata+i+18);
+                cev = iwe_stream_add_point(info, cev, end_buf,
+                                           &iwe, zd->rxdata+i+18);
 
                 iwe.cmd = SIOCGIWMODE;
                 if (zd->rxdata[i+14]&0x01)
                         iwe.u.mode = IW_MODE_MASTER;
                 else
                         iwe.u.mode = IW_MODE_ADHOC;
-                cev = iwe_stream_add_event(cev, end_buf, &iwe, IW_EV_UINT_LEN);
+                cev = iwe_stream_add_event(info, cev, end_buf,
+                                           &iwe, IW_EV_UINT_LEN);
                 
                 iwe.cmd = SIOCGIWFREQ;
                 iwe.u.freq.m = zd->rxdata[i+0];
                 iwe.u.freq.e = 0;
-                cev = iwe_stream_add_event(cev, end_buf, &iwe, IW_EV_FREQ_LEN);
+                cev = iwe_stream_add_event(info, cev, end_buf,
+                                           &iwe, IW_EV_FREQ_LEN);
                 
                 iwe.cmd = SIOCGIWRATE;
                 iwe.u.bitrate.fixed = 0;
                 iwe.u.bitrate.disabled = 0;
                 for (j=0; j<10; j++) if (zd->rxdata[i+50+j]) {
                         iwe.u.bitrate.value = (zd->rxdata[i+50+j]&0x7f)*500000;
-                        cev=iwe_stream_add_event(cev, end_buf, &iwe,
-                            IW_EV_PARAM_LEN);
+                        cev = iwe_stream_add_event(info, cev, end_buf,
+                                                   &iwe, IW_EV_PARAM_LEN);
                 }
                 
                 iwe.cmd = SIOCGIWENCODE;
@@ -1186,14 +1190,15 @@ static int zd1201_get_scan(struct net_device *dev,
                         iwe.u.data.flags = IW_ENCODE_ENABLED;
                 else
                         iwe.u.data.flags = IW_ENCODE_DISABLED;
-                cev = iwe_stream_add_point(cev, end_buf, &iwe, NULL);
+                cev = iwe_stream_add_point(info, cev, end_buf, &iwe, NULL);
                 
                 iwe.cmd = IWEVQUAL;
                 iwe.u.qual.qual = zd->rxdata[i+4];
                 iwe.u.qual.noise= zd->rxdata[i+2]/10-100;
                 iwe.u.qual.level = (256+zd->rxdata[i+4]*100)/255-100;
                 iwe.u.qual.updated = 7;
-                cev = iwe_stream_add_event(cev, end_buf, &iwe, IW_EV_QUAL_LEN);
+                cev = iwe_stream_add_event(info, cev, end_buf,
+                                           &iwe, IW_EV_QUAL_LEN);
         }
 
         if (!enabled_save)